diff --git a/packages/backend/src/server/api/endpoints.ts b/packages/backend/src/server/api/endpoints.ts
index 54f37be9bf20..b75325a739cb 100644
--- a/packages/backend/src/server/api/endpoints.ts
+++ b/packages/backend/src/server/api/endpoints.ts
@@ -184,6 +184,8 @@ import * as ep___drive_folders_show from './endpoints/drive/folders/show.js';
 import * as ep___drive_folders_update from './endpoints/drive/folders/update.js';
 import * as ep___drive_stream from './endpoints/drive/stream.js';
 import * as ep___emailAddress_available from './endpoints/email-address/available.js';
+import * as ep___emoji_addRequest from './endpoints/emoji/add-request.js';
+import * as ep___emoji_updateRequest from './endpoints/emoji/update-request.js';
 import * as ep___endpoint from './endpoints/endpoint.js';
 import * as ep___endpoints from './endpoints/endpoints.js';
 import * as ep___exportCustomEmojis from './endpoints/export-custom-emojis.js';
@@ -582,6 +584,8 @@ const eps = [
 	['drive/folders/update', ep___drive_folders_update],
 	['drive/stream', ep___drive_stream],
 	['email-address/available', ep___emailAddress_available],
+	['emoji/add-request', ep___emoji_addRequest],
+	['emoji/update-request', ep___emoji_updateRequest],
 	['endpoint', ep___endpoint],
 	['endpoints', ep___endpoints],
 	['export-custom-emojis', ep___exportCustomEmojis],
diff --git a/packages/backend/src/server/api/endpoints/emoji/add-request.ts b/packages/backend/src/server/api/endpoints/emoji/add-request.ts
new file mode 100644
index 000000000000..159a10769848
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/emoji/add-request.ts
@@ -0,0 +1,141 @@
+/*
+ * SPDX-FileCopyrightText: Type4ny-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import type { DriveFilesRepository } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
+import { CustomEmojiService } from '@/core/CustomEmojiService.js';
+import { ModerationLogService } from '@/core/ModerationLogService.js';
+import { MetaService } from '@/core/MetaService.js';
+import { DriveService } from '@/core/DriveService.js';
+import { ApiError } from '../../error.js';
+
+export const meta = {
+
+	requireCredential: true,
+	requireRolePolicy: 'canRequestCustomEmojis',
+	kind: 'write:admin:emoji',
+
+	errors: {
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: 'fc46b5a4-6b92-4c33-ac66-b806659bb5cf',
+		},
+		duplicateName: {
+			message: 'Duplicate name.',
+			code: 'DUPLICATE_NAME',
+			id: 'f7a3462c-4e6e-4069-8421-b9bd4f4c3975',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		name: { type: 'string', pattern: '^[a-zA-Z0-9_]+$' },
+		category: {
+			type: 'string',
+			nullable: true,
+			description: 'Use `null` to reset the category.',
+		},
+		aliases: { type: 'array', items: {
+			type: 'string',
+		} },
+		license: { type: 'string', nullable: true },
+		isSensitive: { type: 'boolean', nullable: true },
+		localOnly: { type: 'boolean', nullable: true },
+		fileId: { type: 'string', format: 'misskey:id' },
+		isNotifyIsHome: { type: 'boolean', nullable: true },
+	},
+	required: ['name', 'fileId'],
+} as const;
+
+// TODO: ロジックをサービスに切り出す
+
+@Injectable()
+// eslint-disable-next-line import/no-default-export
+export default class extends Endpoint<typeof meta, typeof paramDef> {
+	constructor(
+		@Inject(DI.driveFilesRepository)
+		private driveFilesRepository: DriveFilesRepository,
+		private metaService: MetaService,
+		private customEmojiService: CustomEmojiService,
+		private driveService: DriveService,
+		private moderationLogService: ModerationLogService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const isDuplicate = await this.customEmojiService.checkDuplicate(ps.name);
+			const isRequestDuplicate = await this.customEmojiService.checkRequestDuplicate(ps.name);
+
+			if (isDuplicate || isRequestDuplicate) throw new ApiError(meta.errors.duplicateName);
+			let driveFile;
+			const tmp = await this.driveFilesRepository.findOneBy({ id: ps.fileId });
+			if (tmp == null) throw new ApiError(meta.errors.noSuchFile);
+
+			try {
+				driveFile = await this.driveService.uploadFromUrl({ url: tmp.url, user: null, force: true });
+			} catch (e) {
+				throw new ApiError();
+			}
+			if (driveFile == null) throw new ApiError(meta.errors.noSuchFile);
+			const { ApiBase, EmojiBotToken, requestEmojiAllOk } = (await this.metaService.fetch());
+			let emoji;
+			if (requestEmojiAllOk) {
+				emoji = await this.customEmojiService.add({
+					driveFile,
+					name: ps.name,
+					category: ps.category ?? null,
+					aliases: ps.aliases ?? [],
+					license: ps.license ?? null,
+					host: null,
+					isSensitive: ps.isSensitive ?? false,
+					localOnly: ps.localOnly ?? false,
+					roleIdsThatCanBeUsedThisEmojiAsReaction: [],
+				}, undefined, me);
+			} else {
+				emoji = await this.customEmojiService.request({
+					driveFile,
+					name: ps.name,
+					category: ps.category ?? null,
+					aliases: ps.aliases ?? [],
+					license: ps.license ?? null,
+					isSensitive: ps.isSensitive ?? false,
+					localOnly: ps.localOnly ?? false,
+				}, me);
+			}
+
+			await this.moderationLogService.log(me, 'addCustomEmoji', {
+				emojiId: emoji.id,
+				emoji: emoji,
+			});
+
+			if (EmojiBotToken) {
+				const data_Miss = {
+					'i': EmojiBotToken,
+					'visibility': ps.isNotifyIsHome ? 'home' : 'public',
+					'text':
+						'絵文字名 : :' + ps.name + ':\n' +
+						'カテゴリ : ' + ps.category + '\n' +
+						'ライセンス : ' + ps.license + '\n' +
+						'タグ : ' + ps.aliases + '\n' +
+						'追加したユーザー : ' + '@' + me.username + '\n',
+				};
+				await fetch(ApiBase + '/notes/create', {
+					method: 'POST',
+					headers: {
+						'Content-Type': 'application/json',
+					},
+					body: JSON.stringify( data_Miss),
+				});
+			}
+
+			return {
+				id: emoji.id,
+			};
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/emoji/update-request.ts b/packages/backend/src/server/api/endpoints/emoji/update-request.ts
new file mode 100644
index 000000000000..2410a811ed62
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/emoji/update-request.ts
@@ -0,0 +1,117 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { DriveFileEntityService } from '@/core/entities/DriveFileEntityService.js';
+import { CustomEmojiService } from '@/core/CustomEmojiService.js';
+import type { DriveFilesRepository } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
+import { ApiError } from '../../error.js';
+
+export const meta = {
+
+	requireCredential: true,
+	requireRolePolicy: 'canManageCustomEmojis',
+	kind: 'write:admin:emoji',
+
+	errors: {
+		noSuchEmoji: {
+			message: 'No such emoji.',
+			code: 'NO_SUCH_EMOJI',
+			id: '684dec9d-a8c2-4364-9aa8-456c49cb1dc8',
+		},
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: '14fb9fd9-0731-4e2f-aeb9-f09e4740333d',
+		},
+		sameNameEmojiExists: {
+			message: 'Emoji that have same name already exists.',
+			code: 'SAME_NAME_EMOJI_EXISTS',
+			id: '7180fe9d-1ee3-bff9-647d-fe9896d2ffb8',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		id: { type: 'string', format: 'misskey:id' },
+		name: { type: 'string', pattern: '^[a-zA-Z0-9_]+$' },
+		fileId: { type: 'string', format: 'misskey:id' },
+		category: {
+			type: 'string',
+			nullable: true,
+			description: 'Use `null` to reset the category.',
+		},
+		aliases: { type: 'array', items: {
+			type: 'string',
+		} },
+		license: { type: 'string', nullable: true },
+		isSensitive: { type: 'boolean' },
+		localOnly: { type: 'boolean' },
+		roleIdsThatCanBeUsedThisEmojiAsReaction: { type: 'array', items: {
+			type: 'string',
+		} },
+		Request: { type: 'boolean' },
+	},
+	required: ['id', 'name', 'aliases'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		@Inject(DI.driveFilesRepository)
+		private driveFilesRepository: DriveFilesRepository,
+
+		private customEmojiService: CustomEmojiService,
+		private driveFileEntityService: DriveFileEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			let driveFile;
+			const isRequest = !!ps.Request;
+			if (ps.fileId) {
+				driveFile = await this.driveFilesRepository.findOneBy({ id: ps.fileId });
+				if (driveFile == null) throw new ApiError(meta.errors.noSuchFile);
+			}
+
+			const emoji = await this.customEmojiService.getEmojiRequestById(ps.id);
+			if (emoji != null) {
+				if (ps.name !== emoji.name) {
+					const isDuplicate = await this.customEmojiService.checkRequestDuplicate(ps.name);
+					if (isDuplicate) throw new ApiError(meta.errors.sameNameEmojiExists);
+				}
+			} else {
+				throw new ApiError(meta.errors.noSuchEmoji);
+			}
+			if (!isRequest) {
+				const file = await this.driveFileEntityService.getFromUrl(emoji.originalUrl);
+				if (file === null) throw new ApiError(meta.errors.noSuchFile);
+				await this.customEmojiService.add({
+					driveFile: file,
+					name: ps.name,
+					category: ps.category ?? null,
+					aliases: ps.aliases ?? [],
+					host: null,
+					license: ps.license ?? null,
+					isSensitive: ps.isSensitive ?? false,
+					localOnly: ps.localOnly ?? false,
+					roleIdsThatCanBeUsedThisEmojiAsReaction: [],
+				}, me);
+				await this.customEmojiService.deleteRequest(ps.id);
+			} else {
+				await this.customEmojiService.updateRequest(ps.id, {
+					name: ps.name,
+					category: ps.category ?? null,
+					aliases: ps.aliases ?? [],
+					license: ps.license ?? null,
+					isSensitive: ps.isSensitive ?? false,
+					localOnly: ps.localOnly ?? false,
+				}, me);
+			}
+		});
+	}
+}