diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 5673a2d416..5746ee1bb8 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -328,6 +328,7 @@ misskeySource: "ソースコードはここで公開されています:"
 administrator: "管理者"
 token: "トークン"
 twoStepAuthentication: "二段階認証"
+moderator: "モデレーター"
 
 _2fa:
   registerDevice: "デバイスを登録"
diff --git a/src/server/api/endpoints/admin/emoji/copy.ts b/src/server/api/endpoints/admin/emoji/copy.ts
new file mode 100644
index 0000000000..4b4319ca81
--- /dev/null
+++ b/src/server/api/endpoints/admin/emoji/copy.ts
@@ -0,0 +1,64 @@
+import $ from 'cafy';
+import define from '../../../define';
+import { Emojis } from '../../../../../models';
+import { genId } from '../../../../../misc/gen-id';
+import { getConnection } from 'typeorm';
+import { ApiError } from '../../../error';
+import { DriveFile } from '../../../../../models/entities/drive-file';
+import { ID } from '../../../../../misc/cafy-id';
+import uploadFromUrl from '../../../../../services/drive/upload-from-url';
+
+export const meta = {
+	tags: ['admin'],
+
+	requireCredential: true,
+	requireModerator: true,
+
+	params: {
+		emojiId: {
+			validator: $.type(ID)
+		},
+	},
+
+	errors: {
+		noSuchEmoji: {
+			message: 'No such emoji.',
+			code: 'NO_SUCH_EMOJI',
+			id: 'e2785b66-dca3-4087-9cac-b93c541cc425'
+		}
+	}
+};
+
+export default define(meta, async (ps, me) => {
+	const emoji = await Emojis.findOne(ps.emojiId);
+
+	if (emoji == null) {
+		throw new ApiError(meta.errors.noSuchEmoji);
+	}
+
+	let driveFile: DriveFile;
+
+	try {
+		// Create file
+		driveFile = await uploadFromUrl(emoji.url, null, null, null, false, true);
+	} catch (e) {
+		throw new ApiError();
+	}
+
+	const copied = await Emojis.save({
+		id: genId(),
+		updatedAt: new Date(),
+		name: emoji.name,
+		host: null,
+		aliases: [],
+		url: driveFile.url,
+		type: driveFile.type,
+		fileId: driveFile.id,
+	});
+
+	await getConnection().queryResultCache!.remove(['meta_emojis']);
+
+	return {
+		id: copied.id
+	};
+});
diff --git a/src/services/drive/add-file.ts b/src/services/drive/add-file.ts
index 7cc710c8b6..962c9d771d 100644
--- a/src/services/drive/add-file.ts
+++ b/src/services/drive/add-file.ts
@@ -257,7 +257,7 @@ async function deleteOldFile(user: IRemoteUser) {
  * @return Created drive file
  */
 export default async function(
-	user: User,
+	user: User | null,
 	path: string,
 	name: string | null = null,
 	comment: string | null = null,
@@ -274,7 +274,7 @@ export default async function(
 	// detect name
 	const detectedName = name || (info.type.ext ? `untitled.${info.type.ext}` : 'untitled');
 
-	if (!force) {
+	if (user && !force) {
 		// Check if there is a file with the same hash
 		const much = await DriveFiles.findOne({
 			md5: info.md5,
@@ -288,7 +288,7 @@ export default async function(
 	}
 
 	//#region Check drive usage
-	if (!isLink) {
+	if (user && !isLink) {
 		const usage = await DriveFiles.clacDriveUsageOf(user);
 
 		const instance = await fetchMeta();
@@ -315,7 +315,7 @@ export default async function(
 
 		const driveFolder = await DriveFolders.findOne({
 			id: folderId,
-			userId: user.id
+			userId: user ? user.id : null
 		});
 
 		if (driveFolder == null) throw new Error('folder-not-found');
@@ -338,23 +338,25 @@ export default async function(
 		properties['avgColor'] = `rgb(${info.avgColor.join(',')}`;
 	}
 
-	const profile = await UserProfiles.findOne(user.id);
+	const profile = user ? await UserProfiles.findOne(user.id) : null;
 
 	const folder = await fetchFolder();
 
 	let file = new DriveFile();
 	file.id = genId();
 	file.createdAt = new Date();
-	file.userId = user.id;
-	file.userHost = user.host;
+	file.userId = user ? user.id : null;
+	file.userHost = user ? user.host : null;
 	file.folderId = folder !== null ? folder.id : null;
 	file.comment = comment;
 	file.properties = properties;
 	file.isLink = isLink;
-	file.isSensitive = Users.isLocalUser(user) && profile!.alwaysMarkNsfw ? true :
-		(sensitive !== null && sensitive !== undefined)
-			? sensitive
-			: false;
+	file.isSensitive = user
+		? Users.isLocalUser(user) && profile!.alwaysMarkNsfw ? true :
+			(sensitive !== null && sensitive !== undefined)
+				? sensitive
+				: false
+		: false;
 
 	if (url !== null) {
 		file.src = url;
@@ -388,7 +390,7 @@ export default async function(
 
 				file = await DriveFiles.findOne({
 					uri: file.uri,
-					userId: user.id
+					userId: user ? user.id : null
 				}) as DriveFile;
 			} else {
 				logger.error(e);
@@ -401,11 +403,13 @@ export default async function(
 
 	logger.succ(`drive file has been created ${file.id}`);
 
-	DriveFiles.pack(file, { self: true }).then(packedFile => {
-		// Publish driveFileCreated event
-		publishMainStream(user.id, 'driveFileCreated', packedFile);
-		publishDriveStream(user.id, 'fileCreated', packedFile);
-	});
+	if (user) {
+		DriveFiles.pack(file, { self: true }).then(packedFile => {
+			// Publish driveFileCreated event
+			publishMainStream(user.id, 'driveFileCreated', packedFile);
+			publishDriveStream(user.id, 'fileCreated', packedFile);
+		});
+	}
 
 	// 統計を更新
 	driveChart.update(file, true);
diff --git a/src/services/drive/upload-from-url.ts b/src/services/drive/upload-from-url.ts
index bfe8c5c3b2..ff2f9a7281 100644
--- a/src/services/drive/upload-from-url.ts
+++ b/src/services/drive/upload-from-url.ts
@@ -11,7 +11,7 @@ const logger = driveLogger.createSubLogger('downloader');
 
 export default async (
 	url: string,
-	user: User,
+	user: User | null,
 	folderId: DriveFolder['id'] | null = null,
 	uri: string | null = null,
 	sensitive = false,