diff --git a/src/api/bot/interfaces/line.ts b/src/api/bot/interfaces/line.ts
index bf0882159..6b2ebdec8 100644
--- a/src/api/bot/interfaces/line.ts
+++ b/src/api/bot/interfaces/line.ts
@@ -121,7 +121,7 @@ class LineBot extends BotCore {
 		actions.push({
 			type: 'uri',
 			label: 'Webで見る',
-			uri: `${config.url}/${user.username}`
+			uri: `${config.url}/@${user.username}`
 		});
 
 		this.reply([{
diff --git a/src/api/models/user.ts b/src/api/models/user.ts
index 08d7fbb8c..63f79908e 100644
--- a/src/api/models/user.ts
+++ b/src/api/models/user.ts
@@ -296,7 +296,7 @@ export const packForAp = (
 
 	if (!_user) return reject('invalid user arg.');
 
-	const userUrl = `${config.url}/${_user.username}`;
+	const userUrl = `${config.url}/@${_user.username}`;
 
 	resolve({
 		"@context": ["https://www.w3.org/ns/activitystreams", {
diff --git a/src/common/othello/ai/back.ts b/src/common/othello/ai/back.ts
index 42a256c0b..27dbc3952 100644
--- a/src/common/othello/ai/back.ts
+++ b/src/common/othello/ai/back.ts
@@ -47,8 +47,8 @@ process.on('message', async msg => {
 		const user = game.user1_id == id ? game.user2 : game.user1;
 		const isSettai = form[0].value === 0;
 		const text = isSettai
-			? `?[${user.name}](${conf.url}/${user.username})さんの接待を始めました！`
-			: `対局を?[${user.name}](${conf.url}/${user.username})さんと始めました！ (強さ${form[0].value})`;
+			? `?[${user.name}](${conf.url}/@${user.username})さんの接待を始めました！`
+			: `対局を?[${user.name}](${conf.url}/@${user.username})さんと始めました！ (強さ${form[0].value})`;
 
 		const res = await request.post(`${conf.api_url}/posts/create`, {
 			json: { i,
@@ -72,15 +72,15 @@ process.on('message', async msg => {
 		const isSettai = form[0].value === 0;
 		const text = isSettai
 			? msg.body.winner_id === null
-				? `?[${user.name}](${conf.url}/${user.username})さんに接待で引き分けました...`
+				? `?[${user.name}](${conf.url}/@${user.username})さんに接待で引き分けました...`
 				: msg.body.winner_id == id
-					? `?[${user.name}](${conf.url}/${user.username})さんに接待で勝ってしまいました...`
-					: `?[${user.name}](${conf.url}/${user.username})さんに接待で負けてあげました♪`
+					? `?[${user.name}](${conf.url}/@${user.username})さんに接待で勝ってしまいました...`
+					: `?[${user.name}](${conf.url}/@${user.username})さんに接待で負けてあげました♪`
 			: msg.body.winner_id === null
-				? `?[${user.name}](${conf.url}/${user.username})さんと引き分けました～`
+				? `?[${user.name}](${conf.url}/@${user.username})さんと引き分けました～`
 				: msg.body.winner_id == id
-					? `?[${user.name}](${conf.url}/${user.username})さんに勝ちました♪`
-					: `?[${user.name}](${conf.url}/${user.username})さんに負けました...`;
+					? `?[${user.name}](${conf.url}/@${user.username})さんに勝ちました♪`
+					: `?[${user.name}](${conf.url}/@${user.username})さんに負けました...`;
 
 		await request.post(`${conf.api_url}/posts/create`, {
 			json: { i,
diff --git a/src/web/app/ch/tags/channel.tag b/src/web/app/ch/tags/channel.tag
index b5c6ce1e6..face824cf 100644
--- a/src/web/app/ch/tags/channel.tag
+++ b/src/web/app/ch/tags/channel.tag
@@ -165,7 +165,7 @@
 <mk-channel-post>
 	<header>
 		<a class="index" @click="reply">{ post.index }:</a>
-		<a class="name" href={ _URL_ + '/' + post.user.username }><b>{ post.user.name }</b></a>
+		<a class="name" href={ _URL_ + '/@' + post.user.username }><b>{ post.user.name }</b></a>
 		<mk-time time={ post.created_at }/>
 		<mk-time time={ post.created_at } mode="detail"/>
 		<span>ID:<i>{ post.user.username }</i></span>
diff --git a/src/web/app/ch/tags/header.tag b/src/web/app/ch/tags/header.tag
index 747bec357..901123d63 100644
--- a/src/web/app/ch/tags/header.tag
+++ b/src/web/app/ch/tags/header.tag
@@ -4,7 +4,7 @@
 	</div>
 	<div>
 		<a v-if="!$root.$data.os.isSignedIn" href={ _URL_ }>ログイン(新規登録)</a>
-		<a v-if="$root.$data.os.isSignedIn" href={ _URL_ + '/' + I.username }>{ I.username }</a>
+		<a v-if="$root.$data.os.isSignedIn" href={ _URL_ + '/@' + I.username }>{ I.username }</a>
 	</div>
 	<style lang="stylus" scoped>
 		:scope
diff --git a/src/web/app/common/views/components/messaging-room.message.vue b/src/web/app/common/views/components/messaging-room.message.vue
index 56854ca2f..647e39a75 100644
--- a/src/web/app/common/views/components/messaging-room.message.vue
+++ b/src/web/app/common/views/components/messaging-room.message.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="message" :data-is-me="isMe">
-	<router-link class="avatar-anchor" :to="`/${message.user.username}`" :title="message.user.username" target="_blank">
+	<router-link class="avatar-anchor" :to="`/@${message.user.username}`" :title="message.user.username" target="_blank">
 		<img class="avatar" :src="`${message.user.avatar_url}?thumbnail&size=80`" alt=""/>
 	</router-link>
 	<div class="content">
diff --git a/src/web/app/common/views/components/post-html.ts b/src/web/app/common/views/components/post-html.ts
index dae118e82..56ee97d38 100644
--- a/src/web/app/common/views/components/post-html.ts
+++ b/src/web/app/common/views/components/post-html.ts
@@ -61,7 +61,7 @@ export default Vue.component('mk-post-html', {
 				case 'mention':
 					return (createElement as any)('a', {
 						attrs: {
-							href: `${url}/${token.username}`,
+							href: `${url}/@${token.username}`,
 							target: '_blank',
 							dataIsMe: (this as any).i && (this as any).i.username == token.username
 						},
diff --git a/src/web/app/common/views/components/signup.vue b/src/web/app/common/views/components/signup.vue
index 2ca1687be..c2e78aa8a 100644
--- a/src/web/app/common/views/components/signup.vue
+++ b/src/web/app/common/views/components/signup.vue
@@ -3,7 +3,7 @@
 	<label class="username">
 		<p class="caption">%fa:at%%i18n:common.tags.mk-signup.username%</p>
 		<input v-model="username" type="text" pattern="^[a-zA-Z0-9-]{3,20}$" placeholder="a~z、A~Z、0~9、-" autocomplete="off" required @input="onChangeUsername"/>
-		<p class="profile-page-url-preview" v-if="shouldShowProfileUrl">{{ `${url}/${username}` }}</p>
+		<p class="profile-page-url-preview" v-if="shouldShowProfileUrl">{{ `${url}/@${username}` }}</p>
 		<p class="info" v-if="usernameState == 'wait'" style="color:#999">%fa:spinner .pulse .fw%%i18n:common.tags.mk-signup.checking%</p>
 		<p class="info" v-if="usernameState == 'ok'" style="color:#3CB7B5">%fa:check .fw%%i18n:common.tags.mk-signup.available%</p>
 		<p class="info" v-if="usernameState == 'unavailable'" style="color:#FF1161">%fa:exclamation-triangle .fw%%i18n:common.tags.mk-signup.unavailable%</p>
diff --git a/src/web/app/common/views/components/welcome-timeline.vue b/src/web/app/common/views/components/welcome-timeline.vue
index 7e35e1f71..062ccda32 100644
--- a/src/web/app/common/views/components/welcome-timeline.vue
+++ b/src/web/app/common/views/components/welcome-timeline.vue
@@ -1,15 +1,15 @@
 <template>
 <div class="mk-welcome-timeline">
 	<div v-for="post in posts">
-		<router-link class="avatar-anchor" :to="`/${post.user.username}`" v-user-preview="post.user.id">
+		<router-link class="avatar-anchor" :to="`/@${post.user.username}`" v-user-preview="post.user.id">
 			<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=96`" alt="avatar"/>
 		</router-link>
 		<div class="body">
 			<header>
-				<router-link class="name" :to="`/${post.user.username}`" v-user-preview="post.user.id">{{ post.user.name }}</router-link>
+				<router-link class="name" :to="`/@${post.user.username}`" v-user-preview="post.user.id">{{ post.user.name }}</router-link>
 				<span class="username">@{{ post.user.username }}</span>
 				<div class="info">
-					<router-link class="created-at" :to="`/${post.user.username}/${post.id}`">
+					<router-link class="created-at" :to="`/@${post.user.username}/${post.id}`">
 						<mk-time :time="post.created_at"/>
 					</router-link>
 				</div>
diff --git a/src/web/app/desktop/script.ts b/src/web/app/desktop/script.ts
index 2362613cd..f2bcc6f8a 100644
--- a/src/web/app/desktop/script.ts
+++ b/src/web/app/desktop/script.ts
@@ -83,8 +83,8 @@ init(async (launch) => {
 		{ path: '/search', component: MkSearch },
 		{ path: '/othello', component: MkOthello },
 		{ path: '/othello/:game', component: MkOthello },
-		{ path: '/:user', component: MkUser },
-		{ path: '/:user/:post', component: MkPost }
+		{ path: '/@:user', component: MkUser },
+		{ path: '/@:user/:post', component: MkPost }
 	]);
 }, true);
 
diff --git a/src/web/app/desktop/views/components/friends-maker.vue b/src/web/app/desktop/views/components/friends-maker.vue
index ab35efc75..65adff7ce 100644
--- a/src/web/app/desktop/views/components/friends-maker.vue
+++ b/src/web/app/desktop/views/components/friends-maker.vue
@@ -3,11 +3,11 @@
 	<p class="title">気になるユーザーをフォロー:</p>
 	<div class="users" v-if="!fetching && users.length > 0">
 		<div class="user" v-for="user in users" :key="user.id">
-			<router-link class="avatar-anchor" :to="`/${user.username}`">
+			<router-link class="avatar-anchor" :to="`/@${user.username}`">
 				<img class="avatar" :src="`${user.avatar_url}?thumbnail&size=42`" alt="" v-user-preview="user.id"/>
 			</router-link>
 			<div class="body">
-				<router-link class="name" :to="`/${user.username}`" v-user-preview="user.id">{{ user.name }}</router-link>
+				<router-link class="name" :to="`/@${user.username}`" v-user-preview="user.id">{{ user.name }}</router-link>
 				<p class="username">@{{ user.username }}</p>
 			</div>
 			<mk-follow-button :user="user"/>
diff --git a/src/web/app/desktop/views/components/notifications.vue b/src/web/app/desktop/views/components/notifications.vue
index d61397d53..86cd1ba4f 100644
--- a/src/web/app/desktop/views/components/notifications.vue
+++ b/src/web/app/desktop/views/components/notifications.vue
@@ -5,82 +5,82 @@
 			<div class="notification" :class="notification.type" :key="notification.id">
 				<mk-time :time="notification.created_at"/>
 				<template v-if="notification.type == 'reaction'">
-					<router-link class="avatar-anchor" :to="`/${notification.user.username}`" v-user-preview="notification.user.id">
+					<router-link class="avatar-anchor" :to="`/@${notification.user.username}`" v-user-preview="notification.user.id">
 						<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>
 							<mk-reaction-icon :reaction="notification.reaction"/>
-							<router-link :to="`/${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</router-link>
+							<router-link :to="`/@${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</router-link>
 						</p>
-						<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+						<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 							%fa:quote-left%{{ getPostSummary(notification.post) }}%fa:quote-right%
 						</router-link>
 					</div>
 				</template>
 				<template v-if="notification.type == 'repost'">
-					<router-link class="avatar-anchor" :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:retweet%
-							<router-link :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
 						</p>
-						<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+						<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 							%fa:quote-left%{{ getPostSummary(notification.post.repost) }}%fa:quote-right%
 						</router-link>
 					</div>
 				</template>
 				<template v-if="notification.type == 'quote'">
-					<router-link class="avatar-anchor" :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:quote-left%
-							<router-link :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
 						</p>
-						<router-link class="post-preview" :to="`/${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
+						<router-link class="post-preview" :to="`/@${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
 					</div>
 				</template>
 				<template v-if="notification.type == 'follow'">
-					<router-link class="avatar-anchor" :to="`/${notification.user.username}`" v-user-preview="notification.user.id">
+					<router-link class="avatar-anchor" :to="`/@${notification.user.username}`" v-user-preview="notification.user.id">
 						<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:user-plus%
-							<router-link :to="`/${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</router-link>
+							<router-link :to="`/@${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</router-link>
 						</p>
 					</div>
 				</template>
 				<template v-if="notification.type == 'reply'">
-					<router-link class="avatar-anchor" :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:reply%
-							<router-link :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
 						</p>
-						<router-link class="post-preview" :to="`/${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
+						<router-link class="post-preview" :to="`/@${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
 					</div>
 				</template>
 				<template v-if="notification.type == 'mention'">
-					<router-link class="avatar-anchor" :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:at%
-							<router-link :to="`/${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${notification.post.user.username}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
 						</p>
-						<a class="post-preview" :href="`/${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</a>
+						<a class="post-preview" :href="`/@${notification.post.user.username}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</a>
 					</div>
 				</template>
 				<template v-if="notification.type == 'poll_vote'">
-					<router-link class="avatar-anchor" :to="`/${notification.user.username}`" v-user-preview="notification.user.id">
+					<router-link class="avatar-anchor" :to="`/@${notification.user.username}`" v-user-preview="notification.user.id">
 						<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
-						<p>%fa:chart-pie%<a :href="`/${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</a></p>
-						<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+						<p>%fa:chart-pie%<a :href="`/@${notification.user.username}`" v-user-preview="notification.user.id">{{ notification.user.name }}</a></p>
+						<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 							%fa:quote-left%{{ getPostSummary(notification.post) }}%fa:quote-right%
 						</router-link>
 					</div>
diff --git a/src/web/app/desktop/views/components/post-detail.sub.vue b/src/web/app/desktop/views/components/post-detail.sub.vue
index c35a07d7c..53fc724fc 100644
--- a/src/web/app/desktop/views/components/post-detail.sub.vue
+++ b/src/web/app/desktop/views/components/post-detail.sub.vue
@@ -1,16 +1,16 @@
 <template>
 <div class="sub" :title="title">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
 	</router-link>
 	<div class="main">
 		<header>
 			<div class="left">
-				<router-link class="name" :to="`/${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+				<router-link class="name" :to="`/@${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
 				<span class="username">@{{ post.user.username }}</span>
 			</div>
 			<div class="right">
-				<router-link class="time" :to="`/${post.user.username}/${post.id}`">
+				<router-link class="time" :to="`/@${post.user.username}/${post.id}`">
 					<mk-time :time="post.created_at"/>
 				</router-link>
 			</div>
diff --git a/src/web/app/desktop/views/components/post-detail.vue b/src/web/app/desktop/views/components/post-detail.vue
index 5845ab4f8..9a8958679 100644
--- a/src/web/app/desktop/views/components/post-detail.vue
+++ b/src/web/app/desktop/views/components/post-detail.vue
@@ -18,22 +18,22 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/${post.user.username}`" v-user-preview="post.user_id">
+			<router-link class="avatar-anchor" :to="`/@${post.user.username}`" v-user-preview="post.user_id">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=32`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
-			<router-link class="name" :href="`/${post.user.username}`">{{ post.user.name }}</router-link>
+			<router-link class="name" :href="`/@${post.user.username}`">{{ post.user.name }}</router-link>
 			がRepost
 		</p>
 	</div>
 	<article>
-		<router-link class="avatar-anchor" :to="`/${p.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${p.user.username}`">
 			<img class="avatar" :src="`${p.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="p.user.id"/>
 		</router-link>
 		<header>
-			<router-link class="name" :to="`/${p.user.username}`" v-user-preview="p.user.id">{{ p.user.name }}</router-link>
+			<router-link class="name" :to="`/@${p.user.username}`" v-user-preview="p.user.id">{{ p.user.name }}</router-link>
 			<span class="username">@{{ p.user.username }}</span>
-			<router-link class="time" :to="`/${p.user.username}/${p.id}`">
+			<router-link class="time" :to="`/@${p.user.username}/${p.id}`">
 				<mk-time :time="p.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/desktop/views/components/post-preview.vue b/src/web/app/desktop/views/components/post-preview.vue
index ec3372f90..edb593457 100644
--- a/src/web/app/desktop/views/components/post-preview.vue
+++ b/src/web/app/desktop/views/components/post-preview.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="mk-post-preview" :title="title">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
 			<span class="username">@{{ post.user.username }}</span>
-			<router-link class="time" :to="`/${post.user.username}/${post.id}`">
+			<router-link class="time" :to="`/@${post.user.username}/${post.id}`">
 				<mk-time :time="post.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/desktop/views/components/posts.post.sub.vue b/src/web/app/desktop/views/components/posts.post.sub.vue
index 69c88fed5..2fd8a9865 100644
--- a/src/web/app/desktop/views/components/posts.post.sub.vue
+++ b/src/web/app/desktop/views/components/posts.post.sub.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="sub" :title="title">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
 			<span class="username">@{{ post.user.username }}</span>
-			<router-link class="created-at" :to="`/${post.user.username}/${post.id}`">
+			<router-link class="created-at" :to="`/@${post.user.username}/${post.id}`">
 				<mk-time :time="post.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/desktop/views/components/posts.post.vue b/src/web/app/desktop/views/components/posts.post.vue
index 71cbbc68d..a525900b9 100644
--- a/src/web/app/desktop/views/components/posts.post.vue
+++ b/src/web/app/desktop/views/components/posts.post.vue
@@ -5,23 +5,23 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/${post.user.username}`" v-user-preview="post.user_id">
+			<router-link class="avatar-anchor" :to="`/@${post.user.username}`" v-user-preview="post.user_id">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=32`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
 			<span>{{ '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.substr(0, '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.indexOf('{')) }}</span>
-			<a class="name" :href="`/${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</a>
+			<a class="name" :href="`/@${post.user.username}`" v-user-preview="post.user_id">{{ post.user.name }}</a>
 			<span>{{ '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.substr('%i18n:desktop.tags.mk-timeline-post.reposted-by%'.indexOf('}') + 1) }}</span>
 		</p>
 		<mk-time :time="post.created_at"/>
 	</div>
 	<article>
-		<router-link class="avatar-anchor" :to="`/${p.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${p.user.username}`">
 			<img class="avatar" :src="`${p.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="p.user.id"/>
 		</router-link>
 		<div class="main">
 			<header>
-				<router-link class="name" :to="`/${p.user.username}`" v-user-preview="p.user.id">{{ p.user.name }}</router-link>
+				<router-link class="name" :to="`/@${p.user.username}`" v-user-preview="p.user.id">{{ p.user.name }}</router-link>
 				<span class="is-bot" v-if="p.user.account.is_bot">bot</span>
 				<span class="username">@{{ p.user.username }}</span>
 				<div class="info">
@@ -135,7 +135,7 @@ export default Vue.extend({
 			return dateStringify(this.p.created_at);
 		},
 		url(): string {
-			return `/${this.p.user.username}/${this.p.id}`;
+			return `/@${this.p.user.username}/${this.p.id}`;
 		},
 		urls(): string[] {
 			if (this.p.ast) {
diff --git a/src/web/app/desktop/views/components/ui.header.account.vue b/src/web/app/desktop/views/components/ui.header.account.vue
index 2cc2c1867..19b9d7779 100644
--- a/src/web/app/desktop/views/components/ui.header.account.vue
+++ b/src/web/app/desktop/views/components/ui.header.account.vue
@@ -8,7 +8,7 @@
 		<div class="menu" v-if="isOpen">
 			<ul>
 				<li>
-					<router-link :to="`/${ os.i.username }`">%fa:user%%i18n:desktop.tags.mk-ui-header-account.profile%%fa:angle-right%</router-link>
+					<router-link :to="`/@${ os.i.username }`">%fa:user%%i18n:desktop.tags.mk-ui-header-account.profile%%fa:angle-right%</router-link>
 				</li>
 				<li @click="drive">
 					<p>%fa:cloud%%i18n:desktop.tags.mk-ui-header-account.drive%%fa:angle-right%</p>
diff --git a/src/web/app/desktop/views/components/user-preview.vue b/src/web/app/desktop/views/components/user-preview.vue
index cfb95961d..ffc959fac 100644
--- a/src/web/app/desktop/views/components/user-preview.vue
+++ b/src/web/app/desktop/views/components/user-preview.vue
@@ -2,11 +2,11 @@
 <div class="mk-user-preview">
 	<template v-if="u != null">
 		<div class="banner" :style="u.banner_url ? `background-image: url(${u.banner_url}?thumbnail&size=512)` : ''"></div>
-		<router-link class="avatar" :to="`/${u.username}`">
+		<router-link class="avatar" :to="`/@${u.username}`">
 			<img :src="`${u.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 		<div class="title">
-			<router-link class="name" :to="`/${u.username}`">{{ u.name }}</router-link>
+			<router-link class="name" :to="`/@${u.username}`">{{ u.name }}</router-link>
 			<p class="username">@{{ u.username }}</p>
 		</div>
 		<div class="description">{{ u.description }}</div>
diff --git a/src/web/app/desktop/views/components/users-list.item.vue b/src/web/app/desktop/views/components/users-list.item.vue
index 374f55b41..2d1e13347 100644
--- a/src/web/app/desktop/views/components/users-list.item.vue
+++ b/src/web/app/desktop/views/components/users-list.item.vue
@@ -1,11 +1,11 @@
 <template>
 <div class="root item">
-	<router-link class="avatar-anchor" :to="`/${user.username}`" v-user-preview="user.id">
+	<router-link class="avatar-anchor" :to="`/@${user.username}`" v-user-preview="user.id">
 		<img class="avatar" :src="`${user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${user.username}`" v-user-preview="user.id">{{ user.name }}</router-link>
+			<router-link class="name" :to="`/@${user.username}`" v-user-preview="user.id">{{ user.name }}</router-link>
 			<span class="username">@{{ user.username }}</span>
 		</header>
 		<div class="body">
diff --git a/src/web/app/desktop/views/pages/user/user.followers-you-know.vue b/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
index 015b12d3d..20675c454 100644
--- a/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
+++ b/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
@@ -3,7 +3,7 @@
 	<p class="title">%fa:users%%i18n:desktop.tags.mk-user.followers-you-know.title%</p>
 	<p class="initializing" v-if="fetching">%fa:spinner .pulse .fw%%i18n:desktop.tags.mk-user.followers-you-know.loading%<mk-ellipsis/></p>
 	<div v-if="!fetching && users.length > 0">
-	<router-link v-for="user in users" :to="`/${user.username}`" :key="user.id">
+	<router-link v-for="user in users" :to="`/@${user.username}`" :key="user.id">
 		<img :src="`${user.avatar_url}?thumbnail&size=64`" :alt="user.name" v-user-preview="user.id"/>
 	</router-link>
 	</div>
diff --git a/src/web/app/desktop/views/pages/user/user.friends.vue b/src/web/app/desktop/views/pages/user/user.friends.vue
index d27009a82..a60020f59 100644
--- a/src/web/app/desktop/views/pages/user/user.friends.vue
+++ b/src/web/app/desktop/views/pages/user/user.friends.vue
@@ -4,11 +4,11 @@
 	<p class="initializing" v-if="fetching">%fa:spinner .pulse .fw%%i18n:desktop.tags.mk-user.frequently-replied-users.loading%<mk-ellipsis/></p>
 	<template v-if="!fetching && users.length != 0">
 		<div class="user" v-for="friend in users">
-			<router-link class="avatar-anchor" :to="`/${friend.username}`">
+			<router-link class="avatar-anchor" :to="`/@${friend.username}`">
 				<img class="avatar" :src="`${friend.avatar_url}?thumbnail&size=42`" alt="" v-user-preview="friend.id"/>
 			</router-link>
 			<div class="body">
-				<router-link class="name" :to="`/${friend.username}`" v-user-preview="friend.id">{{ friend.name }}</router-link>
+				<router-link class="name" :to="`/@${friend.username}`" v-user-preview="friend.id">{{ friend.name }}</router-link>
 				<p class="username">@{{ friend.username }}</p>
 			</div>
 			<mk-follow-button :user="friend"/>
diff --git a/src/web/app/desktop/views/pages/user/user.header.vue b/src/web/app/desktop/views/pages/user/user.header.vue
index 63542055d..e60b312ca 100644
--- a/src/web/app/desktop/views/pages/user/user.header.vue
+++ b/src/web/app/desktop/views/pages/user/user.header.vue
@@ -12,9 +12,9 @@
 			<p class="location" v-if="user.account.profile.location">%fa:map-marker%{{ user.account.profile.location }}</p>
 		</div>
 		<footer>
-			<router-link :to="`/${user.username}`" :data-active="$parent.page == 'home'">%fa:home%概要</router-link>
-			<router-link :to="`/${user.username}/media`" :data-active="$parent.page == 'media'">%fa:image%メディア</router-link>
-			<router-link :to="`/${user.username}/graphs`" :data-active="$parent.page == 'graphs'">%fa:chart-bar%グラフ</router-link>
+			<router-link :to="`/@${user.username}`" :data-active="$parent.page == 'home'">%fa:home%概要</router-link>
+			<router-link :to="`/@${user.username}/media`" :data-active="$parent.page == 'media'">%fa:image%メディア</router-link>
+			<router-link :to="`/@${user.username}/graphs`" :data-active="$parent.page == 'graphs'">%fa:chart-bar%グラフ</router-link>
 		</footer>
 	</div>
 </div>
diff --git a/src/web/app/desktop/views/pages/welcome.vue b/src/web/app/desktop/views/pages/welcome.vue
index ad1dccae9..c514500b2 100644
--- a/src/web/app/desktop/views/pages/welcome.vue
+++ b/src/web/app/desktop/views/pages/welcome.vue
@@ -8,7 +8,7 @@
 					<p>ようこそ！ <b>Misskey</b>はTwitter風ミニブログSNSです。思ったことや皆と共有したいことを投稿しましょう。タイムラインを見れば、皆の関心事をすぐにチェックすることもできます。<a :href="aboutUrl">詳しく...</a></p>
 					<p><button class="signup" @click="signup">はじめる</button><button class="signin" @click="signin">ログイン</button></p>
 					<div class="users">
-						<router-link v-for="user in users" :key="user.id" class="avatar-anchor" :to="`/${user.username}`" v-user-preview="user.id">
+						<router-link v-for="user in users" :key="user.id" class="avatar-anchor" :to="`/@${user.username}`" v-user-preview="user.id">
 							<img class="avatar" :src="`${user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 						</router-link>
 					</div>
diff --git a/src/web/app/desktop/views/widgets/channel.channel.post.vue b/src/web/app/desktop/views/widgets/channel.channel.post.vue
index faaf0fb73..b2fa92ad4 100644
--- a/src/web/app/desktop/views/widgets/channel.channel.post.vue
+++ b/src/web/app/desktop/views/widgets/channel.channel.post.vue
@@ -2,7 +2,7 @@
 <div class="post">
 	<header>
 		<a class="index" @click="reply">{{ post.index }}:</a>
-		<router-link class="name" :to="`/${post.user.username}`" v-user-preview="post.user.id"><b>{{ post.user.name }}</b></router-link>
+		<router-link class="name" :to="`/@${post.user.username}`" v-user-preview="post.user.id"><b>{{ post.user.name }}</b></router-link>
 		<span>ID:<i>{{ post.user.username }}</i></span>
 	</header>
 	<div>
diff --git a/src/web/app/desktop/views/widgets/polls.vue b/src/web/app/desktop/views/widgets/polls.vue
index fda4e17d8..636378d0b 100644
--- a/src/web/app/desktop/views/widgets/polls.vue
+++ b/src/web/app/desktop/views/widgets/polls.vue
@@ -5,8 +5,8 @@
 		<button @click="fetch" title="%i18n:desktop.tags.mk-recommended-polls-home-widget.refresh%">%fa:sync%</button>
 	</template>
 	<div class="poll" v-if="!fetching && poll != null">
-		<p v-if="poll.text"><router-link to="`/${ poll.user.username }/${ poll.id }`">{{ poll.text }}</router-link></p>
-		<p v-if="!poll.text"><router-link to="`/${ poll.user.username }/${ poll.id }`">%fa:link%</router-link></p>
+		<p v-if="poll.text"><router-link to="`/@${ poll.user.username }/${ poll.id }`">{{ poll.text }}</router-link></p>
+		<p v-if="!poll.text"><router-link to="`/@${ poll.user.username }/${ poll.id }`">%fa:link%</router-link></p>
 		<mk-poll :post="poll"/>
 	</div>
 	<p class="empty" v-if="!fetching && poll == null">%i18n:desktop.tags.mk-recommended-polls-home-widget.nothing%</p>
diff --git a/src/web/app/desktop/views/widgets/profile.vue b/src/web/app/desktop/views/widgets/profile.vue
index e067a0eb2..394010619 100644
--- a/src/web/app/desktop/views/widgets/profile.vue
+++ b/src/web/app/desktop/views/widgets/profile.vue
@@ -15,7 +15,7 @@
 		title="クリックでアバター編集"
 		v-user-preview="os.i.id"
 	/>
-	<router-link class="name" :to="`/${os.i.username}`">{{ os.i.name }}</router-link>
+	<router-link class="name" :to="`/@${os.i.username}`">{{ os.i.name }}</router-link>
 	<p class="username">@{{ os.i.username }}</p>
 </div>
 </template>
diff --git a/src/web/app/desktop/views/widgets/trends.vue b/src/web/app/desktop/views/widgets/trends.vue
index 09cad9ba4..c006c811d 100644
--- a/src/web/app/desktop/views/widgets/trends.vue
+++ b/src/web/app/desktop/views/widgets/trends.vue
@@ -6,8 +6,8 @@
 	</template>
 	<p class="fetching" v-if="fetching">%fa:spinner .pulse .fw%%i18n:common.loading%<mk-ellipsis/></p>
 	<div class="post" v-else-if="post != null">
-		<p class="text"><router-link :to="`/${ post.user.username }/${ post.id }`">{{ post.text }}</router-link></p>
-		<p class="author">―<router-link :to="`/${ post.user.username }`">@{{ post.user.username }}</router-link></p>
+		<p class="text"><router-link :to="`/@${ post.user.username }/${ post.id }`">{{ post.text }}</router-link></p>
+		<p class="author">―<router-link :to="`/@${ post.user.username }`">@{{ post.user.username }}</router-link></p>
 	</div>
 	<p class="empty" v-else>%i18n:desktop.tags.mk-trends-home-widget.nothing%</p>
 </div>
diff --git a/src/web/app/desktop/views/widgets/users.vue b/src/web/app/desktop/views/widgets/users.vue
index f7af8205e..c0a85a08e 100644
--- a/src/web/app/desktop/views/widgets/users.vue
+++ b/src/web/app/desktop/views/widgets/users.vue
@@ -7,11 +7,11 @@
 	<p class="fetching" v-if="fetching">%fa:spinner .pulse .fw%%i18n:common.loading%<mk-ellipsis/></p>
 	<template v-else-if="users.length != 0">
 		<div class="user" v-for="_user in users">
-			<router-link class="avatar-anchor" :to="`/${_user.username}`">
+			<router-link class="avatar-anchor" :to="`/@${_user.username}`">
 				<img class="avatar" :src="`${_user.avatar_url}?thumbnail&size=42`" alt="" v-user-preview="_user.id"/>
 			</router-link>
 			<div class="body">
-				<router-link class="name" :to="`/${_user.username}`" v-user-preview="_user.id">{{ _user.name }}</router-link>
+				<router-link class="name" :to="`/@${_user.username}`" v-user-preview="_user.id">{{ _user.name }}</router-link>
 				<p class="username">@{{ _user.username }}</p>
 			</div>
 			<mk-follow-button :user="_user"/>
diff --git a/src/web/app/mobile/script.ts b/src/web/app/mobile/script.ts
index 2b57b78ad..2fcb085ac 100644
--- a/src/web/app/mobile/script.ts
+++ b/src/web/app/mobile/script.ts
@@ -71,9 +71,9 @@ init((launch) => {
 		{ path: '/search', component: MkSearch },
 		{ path: '/othello', component: MkOthello },
 		{ path: '/othello/:game', component: MkOthello },
-		{ path: '/:user', component: MkUser },
-		{ path: '/:user/followers', component: MkFollowers },
-		{ path: '/:user/following', component: MkFollowing },
-		{ path: '/:user/:post', component: MkPost }
+		{ path: '/@:user', component: MkUser },
+		{ path: '/@:user/followers', component: MkFollowers },
+		{ path: '/@:user/following', component: MkFollowing },
+		{ path: '/@:user/:post', component: MkPost }
 	]);
 }, true);
diff --git a/src/web/app/mobile/views/components/notification.vue b/src/web/app/mobile/views/components/notification.vue
index 506ce3493..301fb81dd 100644
--- a/src/web/app/mobile/views/components/notification.vue
+++ b/src/web/app/mobile/views/components/notification.vue
@@ -2,15 +2,15 @@
 <div class="mk-notification">
 	<div class="notification reaction" v-if="notification.type == 'reaction'">
 		<mk-time :time="notification.created_at"/>
-		<router-link class="avatar-anchor" :to="`/${notification.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${notification.user.username}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 		<div class="text">
 			<p>
 				<mk-reaction-icon :reaction="notification.reaction"/>
-				<router-link :to="`/${notification.user.username}`">{{ notification.user.name }}</router-link>
+				<router-link :to="`/@${notification.user.username}`">{{ notification.user.name }}</router-link>
 			</p>
-			<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+			<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 				%fa:quote-left%{{ getPostSummary(notification.post) }}
 				%fa:quote-right%
 			</router-link>
@@ -19,15 +19,15 @@
 
 	<div class="notification repost" v-if="notification.type == 'repost'">
 		<mk-time :time="notification.created_at"/>
-		<router-link class="avatar-anchor" :to="`/${notification.post.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${notification.post.user.username}`">
 			<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 		<div class="text">
 			<p>
 				%fa:retweet%
-				<router-link :to="`/${notification.post.user.username}`">{{ notification.post.user.name }}</router-link>
+				<router-link :to="`/@${notification.post.user.username}`">{{ notification.post.user.name }}</router-link>
 			</p>
-			<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+			<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 				%fa:quote-left%{{ getPostSummary(notification.post.repost) }}%fa:quote-right%
 			</router-link>
 		</div>
@@ -39,13 +39,13 @@
 
 	<div class="notification follow" v-if="notification.type == 'follow'">
 		<mk-time :time="notification.created_at"/>
-		<router-link class="avatar-anchor" :to="`/${notification.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${notification.user.username}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 		<div class="text">
 			<p>
 				%fa:user-plus%
-				<router-link :to="`/${notification.user.username}`">{{ notification.user.name }}</router-link>
+				<router-link :to="`/@${notification.user.username}`">{{ notification.user.name }}</router-link>
 			</p>
 		</div>
 	</div>
@@ -60,15 +60,15 @@
 
 	<div class="notification poll_vote" v-if="notification.type == 'poll_vote'">
 		<mk-time :time="notification.created_at"/>
-		<router-link class="avatar-anchor" :to="`/${notification.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${notification.user.username}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 		<div class="text">
 			<p>
 				%fa:chart-pie%
-				<router-link :to="`/${notification.user.username}`">{{ notification.user.name }}</router-link>
+				<router-link :to="`/@${notification.user.username}`">{{ notification.user.name }}</router-link>
 			</p>
-			<router-link class="post-ref" :to="`/${notification.post.user.username}/${notification.post.id}`">
+			<router-link class="post-ref" :to="`/@${notification.post.user.username}/${notification.post.id}`">
 				%fa:quote-left%{{ getPostSummary(notification.post) }}%fa:quote-right%
 			</router-link>
 		</div>
diff --git a/src/web/app/mobile/views/components/post-card.vue b/src/web/app/mobile/views/components/post-card.vue
index 08a2bebfc..1b3b20d88 100644
--- a/src/web/app/mobile/views/components/post-card.vue
+++ b/src/web/app/mobile/views/components/post-card.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="mk-post-card">
-	<a :href="`/${post.user.username}/${post.id}`">
+	<a :href="`/@${post.user.username}/${post.id}`">
 		<header>
 			<img :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/><h3>{{ post.user.name }}</h3>
 		</header>
diff --git a/src/web/app/mobile/views/components/post-detail.sub.vue b/src/web/app/mobile/views/components/post-detail.sub.vue
index dff0cef51..153acf78e 100644
--- a/src/web/app/mobile/views/components/post-detail.sub.vue
+++ b/src/web/app/mobile/views/components/post-detail.sub.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="root sub">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${post.user.username}`">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ post.user.username }}</span>
-			<router-link class="time" :to="`/${post.user.username}/${post.id}`">
+			<router-link class="time" :to="`/@${post.user.username}/${post.id}`">
 				<mk-time :time="post.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/mobile/views/components/post-detail.vue b/src/web/app/mobile/views/components/post-detail.vue
index 9baa5de6d..f7af71eea 100644
--- a/src/web/app/mobile/views/components/post-detail.vue
+++ b/src/web/app/mobile/views/components/post-detail.vue
@@ -17,11 +17,11 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+			<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=32`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
-			<router-link class="name" :to="`/${post.user.username}`">
+			<router-link class="name" :to="`/@${post.user.username}`">
 				{{ post.user.name }}
 			</router-link>
 			がRepost
@@ -29,11 +29,11 @@
 	</div>
 	<article>
 		<header>
-			<router-link class="avatar-anchor" :to="`/${p.user.username}`">
+			<router-link class="avatar-anchor" :to="`/@${p.user.username}`">
 				<img class="avatar" :src="`${p.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 			</router-link>
 			<div>
-				<router-link class="name" :to="`/${p.user.username}`">{{ p.user.name }}</router-link>
+				<router-link class="name" :to="`/@${p.user.username}`">{{ p.user.name }}</router-link>
 				<span class="username">@{{ p.user.username }}</span>
 			</div>
 		</header>
@@ -53,7 +53,7 @@
 				<mk-post-preview :post="p.repost"/>
 			</div>
 		</div>
-		<router-link class="time" :to="`/${p.user.username}/${p.id}`">
+		<router-link class="time" :to="`/@${p.user.username}/${p.id}`">
 			<mk-time :time="p.created_at" mode="detail"/>
 		</router-link>
 		<footer>
diff --git a/src/web/app/mobile/views/components/post-preview.vue b/src/web/app/mobile/views/components/post-preview.vue
index e9a411925..787e1a3a7 100644
--- a/src/web/app/mobile/views/components/post-preview.vue
+++ b/src/web/app/mobile/views/components/post-preview.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="mk-post-preview">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${post.user.username}`">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ post.user.username }}</span>
-			<router-link class="time" :to="`/${post.user.username}/${post.id}`">
+			<router-link class="time" :to="`/@${post.user.username}/${post.id}`">
 				<mk-time :time="post.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/mobile/views/components/post.sub.vue b/src/web/app/mobile/views/components/post.sub.vue
index f1c858675..2427cefeb 100644
--- a/src/web/app/mobile/views/components/post.sub.vue
+++ b/src/web/app/mobile/views/components/post.sub.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="sub">
-	<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=96`" alt="avatar"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${post.user.username}`">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ post.user.username }}</span>
-			<router-link class="created-at" :to="`/${post.user.username}/${post.id}`">
+			<router-link class="created-at" :to="`/@${post.user.username}/${post.id}`">
 				<mk-time :time="post.created_at"/>
 			</router-link>
 		</header>
diff --git a/src/web/app/mobile/views/components/post.vue b/src/web/app/mobile/views/components/post.vue
index d53649b11..b8f9e95ee 100644
--- a/src/web/app/mobile/views/components/post.vue
+++ b/src/web/app/mobile/views/components/post.vue
@@ -5,23 +5,23 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/${post.user.username}`">
+			<router-link class="avatar-anchor" :to="`/@${post.user.username}`">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
 			<span>{{ '%i18n:mobile.tags.mk-timeline-post.reposted-by%'.substr(0, '%i18n:mobile.tags.mk-timeline-post.reposted-by%'.indexOf('{')) }}</span>
-			<router-link class="name" :to="`/${post.user.username}`">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${post.user.username}`">{{ post.user.name }}</router-link>
 			<span>{{ '%i18n:mobile.tags.mk-timeline-post.reposted-by%'.substr('%i18n:mobile.tags.mk-timeline-post.reposted-by%'.indexOf('}') + 1) }}</span>
 		</p>
 		<mk-time :time="post.created_at"/>
 	</div>
 	<article>
-		<router-link class="avatar-anchor" :to="`/${p.user.username}`">
+		<router-link class="avatar-anchor" :to="`/@${p.user.username}`">
 			<img class="avatar" :src="`${p.user.avatar_url}?thumbnail&size=96`" alt="avatar"/>
 		</router-link>
 		<div class="main">
 			<header>
-				<router-link class="name" :to="`/${p.user.username}`">{{ p.user.name }}</router-link>
+				<router-link class="name" :to="`/@${p.user.username}`">{{ p.user.name }}</router-link>
 				<span class="is-bot" v-if="p.user.account.is_bot">bot</span>
 				<span class="username">@{{ p.user.username }}</span>
 				<div class="info">
@@ -110,7 +110,7 @@ export default Vue.extend({
 				: 0;
 		},
 		url(): string {
-			return `/${this.p.user.username}/${this.p.id}`;
+			return `/@${this.p.user.username}/${this.p.id}`;
 		},
 		urls(): string[] {
 			if (this.p.ast) {
diff --git a/src/web/app/mobile/views/components/ui.nav.vue b/src/web/app/mobile/views/components/ui.nav.vue
index b8bc2fb04..760a5b518 100644
--- a/src/web/app/mobile/views/components/ui.nav.vue
+++ b/src/web/app/mobile/views/components/ui.nav.vue
@@ -9,7 +9,7 @@
 	</transition>
 	<transition name="nav">
 		<div class="body" v-if="isOpen">
-			<router-link class="me" v-if="os.isSignedIn" :to="`/${os.i.username}`">
+			<router-link class="me" v-if="os.isSignedIn" :to="`/@${os.i.username}`">
 				<img class="avatar" :src="`${os.i.avatar_url}?thumbnail&size=128`" alt="avatar"/>
 				<p class="name">{{ os.i.name }}</p>
 			</router-link>
diff --git a/src/web/app/mobile/views/components/user-card.vue b/src/web/app/mobile/views/components/user-card.vue
index 729421616..bfc748866 100644
--- a/src/web/app/mobile/views/components/user-card.vue
+++ b/src/web/app/mobile/views/components/user-card.vue
@@ -1,11 +1,11 @@
 <template>
 <div class="mk-user-card">
 	<header :style="user.banner_url ? `background-image: url(${user.banner_url}?thumbnail&size=1024)` : ''">
-		<a :href="`/${user.username}`">
+		<a :href="`/@${user.username}`">
 			<img :src="`${user.avatar_url}?thumbnail&size=200`" alt="avatar"/>
 		</a>
 	</header>
-	<a class="name" :href="`/${user.username}`" target="_blank">{{ user.name }}</a>
+	<a class="name" :href="`/@${user.username}`" target="_blank">{{ user.name }}</a>
 	<p class="username">@{{ user.username }}</p>
 	<mk-follow-button :user="user"/>
 </div>
diff --git a/src/web/app/mobile/views/components/user-preview.vue b/src/web/app/mobile/views/components/user-preview.vue
index 3cbc20033..a3db311d1 100644
--- a/src/web/app/mobile/views/components/user-preview.vue
+++ b/src/web/app/mobile/views/components/user-preview.vue
@@ -1,11 +1,11 @@
 <template>
 <div class="mk-user-preview">
-	<router-link class="avatar-anchor" :to="`/${user.username}`">
+	<router-link class="avatar-anchor" :to="`/@${user.username}`">
 		<img class="avatar" :src="`${user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/${user.username}`">{{ user.name }}</router-link>
+			<router-link class="name" :to="`/@${user.username}`">{{ user.name }}</router-link>
 			<span class="username">@{{ user.username }}</span>
 		</header>
 		<div class="body">
diff --git a/src/web/app/mobile/views/pages/user.vue b/src/web/app/mobile/views/pages/user.vue
index f283050b8..ba66052e0 100644
--- a/src/web/app/mobile/views/pages/user.vue
+++ b/src/web/app/mobile/views/pages/user.vue
@@ -30,11 +30,11 @@
 						<b>{{ user.posts_count | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.posts%</i>
 					</a>
-					<a :href="`${user.username}/following`">
+					<a :href="`@${user.username}/following`">
 						<b>{{ user.following_count | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.following%</i>
 					</a>
-					<a :href="`${user.username}/followers`">
+					<a :href="`@${user.username}/followers`">
 						<b>{{ user.followers_count | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.followers%</i>
 					</a>
diff --git a/src/web/app/mobile/views/pages/user/home.followers-you-know.vue b/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
index acefcaa10..7b02020b1 100644
--- a/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
+++ b/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
@@ -2,7 +2,7 @@
 <div class="root followers-you-know">
 	<p class="initializing" v-if="fetching">%fa:spinner .pulse .fw%%i18n:mobile.tags.mk-user-overview-followers-you-know.loading%<mk-ellipsis/></p>
 	<div v-if="!fetching && users.length > 0">
-		<a v-for="user in users" :key="user.id" :href="`/${user.username}`">
+		<a v-for="user in users" :key="user.id" :href="`/@${user.username}`">
 			<img :src="`${user.avatar_url}?thumbnail&size=64`" :alt="user.name"/>
 		</a>
 	</div>
diff --git a/src/web/app/mobile/views/pages/user/home.photos.vue b/src/web/app/mobile/views/pages/user/home.photos.vue
index ddbced608..385e5b8dd 100644
--- a/src/web/app/mobile/views/pages/user/home.photos.vue
+++ b/src/web/app/mobile/views/pages/user/home.photos.vue
@@ -5,7 +5,7 @@
 		<a v-for="image in images"
 			class="img"
 			:style="`background-image: url(${image.media.url}?thumbnail&size=256)`"
-			:href="`/${image.post.user.username}/${image.post.id}`"
+			:href="`/@${image.post.user.username}/${image.post.id}`"
 		></a>
 	</div>
 	<p class="empty" v-if="!fetching && images.length == 0">%i18n:mobile.tags.mk-user-overview-photos.no-photos%</p>
diff --git a/src/web/app/mobile/views/pages/welcome.vue b/src/web/app/mobile/views/pages/welcome.vue
index 563d2b28c..3384ee699 100644
--- a/src/web/app/mobile/views/pages/welcome.vue
+++ b/src/web/app/mobile/views/pages/welcome.vue
@@ -21,7 +21,7 @@
 		<mk-welcome-timeline/>
 	</div>
 	<div class="users">
-		<router-link v-for="user in users" :key="user.id" class="avatar-anchor" :to="`/${user.username}`">
+		<router-link v-for="user in users" :key="user.id" class="avatar-anchor" :to="`/@${user.username}`">
 			<img class="avatar" :src="`${user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
 	</div>
diff --git a/src/web/app/mobile/views/widgets/profile.vue b/src/web/app/mobile/views/widgets/profile.vue
index 6bc7bfffc..1c9d038b4 100644
--- a/src/web/app/mobile/views/widgets/profile.vue
+++ b/src/web/app/mobile/views/widgets/profile.vue
@@ -8,7 +8,7 @@
 			:src="`${os.i.avatar_url}?thumbnail&size=96`"
 			alt="avatar"
 		/>
-		<router-link :class="$style.name" :to="`/${os.i.username}`">{{ os.i.name }}</router-link>
+		<router-link :class="$style.name" :to="`/@${os.i.username}`">{{ os.i.name }}</router-link>
 	</mk-widget-container>
 </div>
 </template>