diff --git a/packages/backend/src/remote/activitypub/kernel/accept/follow.ts b/packages/backend/src/remote/activitypub/kernel/accept/follow.ts
index 58249d2de..037f660c6 100644
--- a/packages/backend/src/remote/activitypub/kernel/accept/follow.ts
+++ b/packages/backend/src/remote/activitypub/kernel/accept/follow.ts
@@ -1,5 +1,5 @@
 import { CacheableRemoteUser } from '@/models/entities/user.js';
-import accept from '@/services/following/requests/accept.js';
+import { acceptFollowRequest } from '@/services/following/requests/accept.js';
 import { relayAccepted } from '@/services/relay.js';
 import { IFollow } from '@/remote/activitypub/type.js';
 import { DbResolver } from '@/remote/activitypub/db-resolver.js';
@@ -24,6 +24,6 @@ export default async (actor: CacheableRemoteUser, activity: IFollow): Promise<st
 		return await relayAccepted(match[1]);
 	}
 
-	await accept(actor, follower);
+	await acceptFollowRequest(actor, follower);
 	return 'ok';
 };
diff --git a/packages/backend/src/remote/activitypub/kernel/undo/follow.ts b/packages/backend/src/remote/activitypub/kernel/undo/follow.ts
index b2607351a..d6f334e52 100644
--- a/packages/backend/src/remote/activitypub/kernel/undo/follow.ts
+++ b/packages/backend/src/remote/activitypub/kernel/undo/follow.ts
@@ -1,5 +1,5 @@
 import unfollow from '@/services/following/delete.js';
-import cancelRequest from '@/services/following/requests/cancel.js';
+import { cancelFollowRequest } from '@/services/following/requests/cancel.js';
 import { CacheableRemoteUser } from '@/models/entities/user.js';
 import { FollowRequests, Followings } from '@/models/index.js';
 import { IFollow } from '@/remote/activitypub/type.js';
@@ -29,7 +29,7 @@ export default async (actor: CacheableRemoteUser, activity: IFollow): Promise<st
 	]);
 
 	if (req) {
-		await cancelRequest(followee, actor);
+		await cancelFollowRequest(followee, actor);
 		return 'ok: follow request canceled';
 	} else if (following) {
 		await unfollow(actor, followee);
diff --git a/packages/backend/src/server/api/endpoints/following/requests/accept.ts b/packages/backend/src/server/api/endpoints/following/requests/accept.ts
index cd30eab98..f31aab855 100644
--- a/packages/backend/src/server/api/endpoints/following/requests/accept.ts
+++ b/packages/backend/src/server/api/endpoints/following/requests/accept.ts
@@ -1,4 +1,4 @@
-import acceptFollowRequest from '@/services/following/requests/accept.js';
+import { acceptFollowRequest } from '@/services/following/requests/accept.js';
 import define from '../../../define.js';
 import { ApiError } from '../../../error.js';
 import { getUser } from '../../../common/getters.js';
diff --git a/packages/backend/src/server/api/endpoints/following/requests/cancel.ts b/packages/backend/src/server/api/endpoints/following/requests/cancel.ts
index 3827007f1..c1c1e722e 100644
--- a/packages/backend/src/server/api/endpoints/following/requests/cancel.ts
+++ b/packages/backend/src/server/api/endpoints/following/requests/cancel.ts
@@ -1,4 +1,4 @@
-import cancelFollowRequest from '@/services/following/requests/cancel.js';
+import { cancelFollowRequest } from '@/services/following/requests/cancel.js';
 import { Users } from '@/models/index.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import define from '../../../define.js';
diff --git a/packages/backend/src/server/api/endpoints/i/update.ts b/packages/backend/src/server/api/endpoints/i/update.ts
index 57c349803..d73f2111a 100644
--- a/packages/backend/src/server/api/endpoints/i/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/update.ts
@@ -2,7 +2,7 @@ import RE2 from 're2';
 import * as mfm from 'mfm-js';
 import { notificationTypes } from 'foundkey-js';
 import { publishMainStream, publishUserEvent } from '@/services/stream.js';
-import acceptAllFollowRequests from '@/services/following/requests/accept-all.js';
+import { acceptAllFollowRequests } from '@/services/following/requests/accept-all.js';
 import { publishToFollowers } from '@/services/i/update.js';
 import { extractCustomEmojisFromMfm } from '@/misc/extract-custom-emojis-from-mfm.js';
 import { extractHashtags } from '@/misc/extract-hashtags.js';
diff --git a/packages/backend/src/services/following/create.ts b/packages/backend/src/services/following/create.ts
index b866c8383..a4f546266 100644
--- a/packages/backend/src/services/following/create.ts
+++ b/packages/backend/src/services/following/create.ts
@@ -15,7 +15,7 @@ import { getActiveWebhooks } from '@/misc/webhook-cache.js';
 import { registerOrFetchInstanceDoc } from '../register-or-fetch-instance-doc.js';
 import Logger from '../logger.js';
 import { createNotification } from '../create-notification.js';
-import createFollowRequest from './requests/create.js';
+import { createFollowRequest } from './requests/create.js';
 
 const logger = new Logger('following/create');
 
diff --git a/packages/backend/src/services/following/requests/accept-all.ts b/packages/backend/src/services/following/requests/accept-all.ts
index 2a1344d65..ccc608c28 100644
--- a/packages/backend/src/services/following/requests/accept-all.ts
+++ b/packages/backend/src/services/following/requests/accept-all.ts
@@ -1,18 +1,18 @@
 import { User } from '@/models/entities/user.js';
 import { FollowRequests, Users } from '@/models/index.js';
-import accept from './accept.js';
+import { acceptFollowRequest } from './accept.js';
 
 /**
- * 指定したユーザー宛てのフォローリクエストをすべて承認
- * @param user ユーザー
+ * Approve all follow requests addressed to the specified user.
+ * @param user The user whom to accept all follow requests to
  */
-export default async function(user: { id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']; }) {
+export async function acceptAllFollowRequests(user: User): Promise<void> {
 	const requests = await FollowRequests.findBy({
 		followeeId: user.id,
 	});
 
 	for (const request of requests) {
 		const follower = await Users.findOneByOrFail({ id: request.followerId });
-		accept(user, follower);
+		acceptFollowRequest(user, follower);
 	}
 }
diff --git a/packages/backend/src/services/following/requests/accept.ts b/packages/backend/src/services/following/requests/accept.ts
index 66abb0646..231075100 100644
--- a/packages/backend/src/services/following/requests/accept.ts
+++ b/packages/backend/src/services/following/requests/accept.ts
@@ -3,12 +3,17 @@ import renderFollow from '@/remote/activitypub/renderer/follow.js';
 import renderAccept from '@/remote/activitypub/renderer/accept.js';
 import { deliver } from '@/queue/index.js';
 import { publishMainStream } from '@/services/stream.js';
-import { User, CacheableUser } from '@/models/entities/user.js';
+import { User } from '@/models/entities/user.js';
 import { FollowRequests, Users } from '@/models/index.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { insertFollowingDoc } from '../create.js';
 
-export default async function(followee: { id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']; }, follower: CacheableUser) {
+/**
+ * Accept a follow request from user `followee` to follow `follower`.
+ * @param followee User who is being followed
+ * @param follower User making the follow request
+ */
+export async function acceptFollowRequest(followee: User, follower: User): Promise<void> {
 	const request = await FollowRequests.findOneBy({
 		followeeId: followee.id,
 		followerId: follower.id,
diff --git a/packages/backend/src/services/following/requests/cancel.ts b/packages/backend/src/services/following/requests/cancel.ts
index fc13381db..999ebc64e 100644
--- a/packages/backend/src/services/following/requests/cancel.ts
+++ b/packages/backend/src/services/following/requests/cancel.ts
@@ -7,7 +7,12 @@ import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { User } from '@/models/entities/user.js';
 import { Users, FollowRequests } from '@/models/index.js';
 
-export default async function(followee: { id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox'] }, follower: { id: User['id']; host: User['host']; uri: User['host'] }) {
+/**
+ * Cancel a follow request from `follower` to `followee`.
+ * @param followee User that was going to be followed
+ * @param follower User who is making the follow request
+ */
+export async function cancelFollowRequest(followee: User, follower: User): Promise<void> {
 	if (Users.isRemoteUser(followee)) {
 		const content = renderActivity(renderUndo(renderFollow(follower, followee), follower));
 
diff --git a/packages/backend/src/services/following/requests/create.ts b/packages/backend/src/services/following/requests/create.ts
index e8971ba57..81fec5fe4 100644
--- a/packages/backend/src/services/following/requests/create.ts
+++ b/packages/backend/src/services/following/requests/create.ts
@@ -7,7 +7,13 @@ import { Blockings, FollowRequests, Users } from '@/models/index.js';
 import { genId } from '@/misc/gen-id.js';
 import { createNotification } from '@/services/create-notification.js';
 
-export default async function(follower: { id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']; }, followee: { id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']; }, requestId?: string) {
+/**
+ * Make a follow request from `follower` to `followee`.
+ * @param follower User making the follow request
+ * @param followee User to make the follow request to
+ * @param requestId Follow request ID
+ */
+export async function createFollowRequest(follower: User, followee: User, requestId?: string): Promise<void> {
 	if (follower.id === followee.id) return;
 
 	// check blocking