diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index aa8e2bd16..04dec100f 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -655,6 +655,8 @@ useSystemFont: "システムのデフォルトのフォントを使う"
 clips: "クリップ"
 experimentalFeatures: "実験的機能"
 developer: "開発者"
+makeExplorable: "アカウントを見つけやすくする"
+makeExplorableDescription: "オフにすると、「みつける」にアカウントが載らなくなります。"
 
 _aboutMisskey:
   about: "Misskeyはsyuiloによって2014年から開発されている、オープンソースのソフトウェアです。"
diff --git a/migration/1607353487793-isExplorable.ts b/migration/1607353487793-isExplorable.ts
new file mode 100644
index 000000000..034f8c384
--- /dev/null
+++ b/migration/1607353487793-isExplorable.ts
@@ -0,0 +1,18 @@
+import {MigrationInterface, QueryRunner} from "typeorm";
+
+export class isExplorable1607353487793 implements MigrationInterface {
+    name = 'isExplorable1607353487793'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "user" ADD "isExplorable" boolean NOT NULL DEFAULT true`);
+        await queryRunner.query(`COMMENT ON COLUMN "user"."isExplorable" IS 'Whether the User is explorable.'`);
+        await queryRunner.query(`CREATE INDEX "IDX_d5a1b83c7cab66f167e6888188" ON "user" ("isExplorable") `);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`DROP INDEX "IDX_d5a1b83c7cab66f167e6888188"`);
+        await queryRunner.query(`COMMENT ON COLUMN "user"."isExplorable" IS 'Whether the User is explorable.'`);
+        await queryRunner.query(`ALTER TABLE "user" DROP COLUMN "isExplorable"`);
+    }
+
+}
diff --git a/src/client/pages/settings/privacy.vue b/src/client/pages/settings/privacy.vue
index 09db07750..d5242a5f5 100644
--- a/src/client/pages/settings/privacy.vue
+++ b/src/client/pages/settings/privacy.vue
@@ -9,6 +9,10 @@
 		{{ $t('noCrawle') }}
 		<template #desc>{{ $t('noCrawleDescription') }}</template>
 	</FormSwitch>
+	<FormSwitch v-model:value="isExplorable" @update:value="save()">
+		{{ $t('makeExplorable') }}
+		<template #desc>{{ $t('makeExplorableDescription') }}</template>
+	</FormSwitch>
 	<FormSwitch v-model:value="rememberNoteVisibility" @update:value="save()">{{ $t('rememberNoteVisibility') }}</FormSwitch>
 	<FormGroup v-if="!rememberNoteVisibility">
 		<template #label>{{ $t('defaultNoteVisibility') }}</template>
@@ -51,6 +55,7 @@ export default defineComponent({
 			isLocked: false,
 			autoAcceptFollowed: false,
 			noCrawle: false,
+			isExplorable: false,
 		}
 	},
 
@@ -75,6 +80,7 @@ export default defineComponent({
 		this.isLocked = this.$store.state.i.isLocked;
 		this.autoAcceptFollowed = this.$store.state.i.autoAcceptFollowed;
 		this.noCrawle = this.$store.state.i.noCrawle;
+		this.isExplorable = this.$store.state.i.isExplorable;
 	},
 
 	mounted() {
@@ -87,6 +93,7 @@ export default defineComponent({
 				isLocked: !!this.isLocked,
 				autoAcceptFollowed: !!this.autoAcceptFollowed,
 				noCrawle: !!this.noCrawle,
+				isExplorable: !!this.isExplorable,
 			});
 		}
 	}
diff --git a/src/models/entities/user.ts b/src/models/entities/user.ts
index fee5906a3..ba2062fdb 100644
--- a/src/models/entities/user.ts
+++ b/src/models/entities/user.ts
@@ -157,6 +157,13 @@ export class User {
 	})
 	public isModerator: boolean;
 
+	@Index()
+	@Column('boolean', {
+		default: true,
+		comment: 'Whether the User is explorable.'
+	})
+	public isExplorable: boolean;
+
 	@Column('varchar', {
 		length: 128, array: true, default: '{}'
 	})
diff --git a/src/models/repositories/user.ts b/src/models/repositories/user.ts
index 87f50b448..29facf523 100644
--- a/src/models/repositories/user.ts
+++ b/src/models/repositories/user.ts
@@ -240,6 +240,7 @@ export class UserRepository extends Repository<User> {
 				carefulBot: profile!.carefulBot,
 				autoAcceptFollowed: profile!.autoAcceptFollowed,
 				noCrawle: profile!.noCrawle,
+				isExplorable: user.isExplorable,
 				hasUnreadSpecifiedNotes: NoteUnreads.count({
 					where: { userId: user.id, isSpecified: true },
 					take: 1
diff --git a/src/remote/activitypub/models/person.ts b/src/remote/activitypub/models/person.ts
index 9f6392174..f0a312b21 100644
--- a/src/remote/activitypub/models/person.ts
+++ b/src/remote/activitypub/models/person.ts
@@ -153,6 +153,7 @@ export async function createPerson(uri: string, resolver?: Resolver): Promise<Us
 				lastFetchedAt: new Date(),
 				name: person.name,
 				isLocked: !!person.manuallyApprovesFollowers,
+				isExplorable: !!person.discoverable,
 				username: person.preferredUsername,
 				usernameLower: person.preferredUsername!.toLowerCase(),
 				host,
@@ -336,6 +337,7 @@ export async function updatePerson(uri: string, resolver?: Resolver | null, hint
 		isBot: object.type === 'Service',
 		isCat: (person as any).isCat === true,
 		isLocked: !!person.manuallyApprovesFollowers,
+		isExplorable: !!person.discoverable,
 	} as Partial<User>;
 
 	if (avatar) {
diff --git a/src/remote/activitypub/renderer/index.ts b/src/remote/activitypub/renderer/index.ts
index cf0fd8d85..a34febff2 100644
--- a/src/remote/activitypub/renderer/index.ts
+++ b/src/remote/activitypub/renderer/index.ts
@@ -38,6 +38,7 @@ export const attachLdSignature = async (activity: any, user: ILocalUser): Promis
 		toot: 'http://joinmastodon.org/ns#',
 		Emoji: 'toot:Emoji',
 		featured: 'toot:featured',
+		discoverable: 'toot:discoverable',
 		// schema
 		schema: 'http://schema.org#',
 		PropertyValue: 'schema:PropertyValue',
diff --git a/src/remote/activitypub/renderer/person.ts b/src/remote/activitypub/renderer/person.ts
index 87dca19ac..4462f8831 100644
--- a/src/remote/activitypub/renderer/person.ts
+++ b/src/remote/activitypub/renderer/person.ts
@@ -70,6 +70,7 @@ export async function renderPerson(user: ILocalUser) {
 		image: banner ? renderImage(banner) : null,
 		tag,
 		manuallyApprovesFollowers: user.isLocked,
+		discoverable: !!user.isExplorable,
 		publicKey: renderKey(user, keypair, `#main-key`),
 		isCat: user.isCat,
 		attachment: attachment.length ? attachment : undefined
diff --git a/src/remote/activitypub/type.ts b/src/remote/activitypub/type.ts
index 5c01c24b5..db866ae67 100644
--- a/src/remote/activitypub/type.ts
+++ b/src/remote/activitypub/type.ts
@@ -135,6 +135,7 @@ export interface IPerson extends IObject {
 	name?: string;
 	preferredUsername?: string;
 	manuallyApprovesFollowers?: boolean;
+	discoverable?: boolean;
 	inbox?: string;
 	sharedInbox?: string;	// 後方互換性のため
 	publicKey: {
diff --git a/src/server/api/endpoints/i/update.ts b/src/server/api/endpoints/i/update.ts
index 087267120..8ac427cd5 100644
--- a/src/server/api/endpoints/i/update.ts
+++ b/src/server/api/endpoints/i/update.ts
@@ -92,6 +92,10 @@ export const meta = {
 			}
 		},
 
+		isExplorable: {
+			validator: $.optional.bool,
+		},
+
 		carefulBot: {
 			validator: $.optional.bool,
 			desc: {
@@ -208,6 +212,7 @@ export default define(meta, async (ps, user, token) => {
 	}
 	if (ps.mutingNotificationTypes !== undefined) profileUpdates.mutingNotificationTypes = ps.mutingNotificationTypes as typeof notificationTypes[number][];
 	if (typeof ps.isLocked === 'boolean') updates.isLocked = ps.isLocked;
+	if (typeof ps.isExplorable === 'boolean') updates.isExplorable = ps.isExplorable;
 	if (typeof ps.isBot === 'boolean') updates.isBot = ps.isBot;
 	if (typeof ps.carefulBot === 'boolean') profileUpdates.carefulBot = ps.carefulBot;
 	if (typeof ps.autoAcceptFollowed === 'boolean') profileUpdates.autoAcceptFollowed = ps.autoAcceptFollowed;
diff --git a/src/server/api/endpoints/users.ts b/src/server/api/endpoints/users.ts
index 9d7991b40..1c1647257 100644
--- a/src/server/api/endpoints/users.ts
+++ b/src/server/api/endpoints/users.ts
@@ -64,12 +64,13 @@ export const meta = {
 
 export default define(meta, async (ps, me) => {
 	const query = Users.createQueryBuilder('user');
+	query.where('user.isExplorable = TRUE');
 
 	switch (ps.state) {
-		case 'admin': query.where('user.isAdmin = TRUE'); break;
-		case 'moderator': query.where('user.isModerator = TRUE'); break;
-		case 'adminOrModerator': query.where('user.isAdmin = TRUE OR isModerator = TRUE'); break;
-		case 'alive': query.where('user.updatedAt > :date', { date: new Date(Date.now() - 1000 * 60 * 60 * 24 * 5) }); break;
+		case 'admin': query.andWhere('user.isAdmin = TRUE'); break;
+		case 'moderator': query.andWhere('user.isModerator = TRUE'); break;
+		case 'adminOrModerator': query.andWhere('user.isAdmin = TRUE OR isModerator = TRUE'); break;
+		case 'alive': query.andWhere('user.updatedAt > :date', { date: new Date(Date.now() - 1000 * 60 * 60 * 24 * 5) }); break;
 	}
 
 	switch (ps.origin) {
diff --git a/src/server/api/endpoints/users/recommendation.ts b/src/server/api/endpoints/users/recommendation.ts
index 1b59624aa..7f80b5275 100644
--- a/src/server/api/endpoints/users/recommendation.ts
+++ b/src/server/api/endpoints/users/recommendation.ts
@@ -42,6 +42,7 @@ export const meta = {
 export default define(meta, async (ps, me) => {
 	const query = Users.createQueryBuilder('user')
 		.where('user.isLocked = FALSE')
+		.andWhere('user.isExplorable = TRUE')
 		.andWhere('user.host IS NULL')
 		.andWhere('user.updatedAt >= :date', { date: new Date(Date.now() - ms('7days')) })
 		.andWhere('user.id != :meId', { meId: me.id })
diff --git a/src/services/create-system-user.ts b/src/services/create-system-user.ts
index 7f59efb44..3c44c7427 100644
--- a/src/services/create-system-user.ts
+++ b/src/services/create-system-user.ts
@@ -34,6 +34,7 @@ export async function createSystemUser(username: string) {
 			token: secret,
 			isAdmin: false,
 			isLocked: true,
+			isExplorable: false,
 			isBot: true,
 		}));