diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e525ace6a..6959c8577c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,8 @@
 - Feat: ユーザーごとに他ユーザーへの返信をタイムラインに含めるか設定可能になりました
 - Feat: ユーザーリスト内のメンバーごとに他ユーザーへの返信をユーザーリストタイムラインに含めるか設定可能になりました
 - Enhance: ソフトワードミュートとハードワードミュートは統合されました
+- Enhance: モデレーションログ機能の強化
+- Enhance: ローカリゼーションの更新
 
 ### Client
 - Enhance: 二要素認証のバックアップコード一覧をテキストファイルでダウンロード可能に
diff --git a/packages/backend/src/core/AnnouncementService.ts b/packages/backend/src/core/AnnouncementService.ts
index ddacc0936f..a5330db53f 100644
--- a/packages/backend/src/core/AnnouncementService.ts
+++ b/packages/backend/src/core/AnnouncementService.ts
@@ -158,9 +158,13 @@ export class AnnouncementService {
 
 		if (moderator) {
 			if (announcement.userId) {
+				const user = await this.usersRepository.findOneByOrFail({ id: announcement.userId });
 				this.moderationLogService.log(moderator, 'deleteUserAnnouncement', {
 					announcementId: announcement.id,
 					announcement: announcement,
+					userId: announcement.userId,
+					userUsername: user.username,
+					userHost: user.host,
 				});
 			} else {
 				this.moderationLogService.log(moderator, 'deleteGlobalAnnouncement', {
diff --git a/packages/backend/src/types.ts b/packages/backend/src/types.ts
index a9b9a55bc0..316073c992 100644
--- a/packages/backend/src/types.ts
+++ b/packages/backend/src/types.ts
@@ -171,6 +171,9 @@ export type ModerationLogPayloads = {
 	deleteUserAnnouncement: {
 		announcementId: string;
 		announcement: any;
+		userId: string;
+		userUsername: string;
+		userHost: string | null;
 	};
 	resetPassword: {
 		userId: string;
diff --git a/packages/frontend/src/pages/admin/modlog.ModLog.vue b/packages/frontend/src/pages/admin/modlog.ModLog.vue
index 66561c969e..0af226f02e 100644
--- a/packages/frontend/src/pages/admin/modlog.ModLog.vue
+++ b/packages/frontend/src/pages/admin/modlog.ModLog.vue
@@ -29,8 +29,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<span v-else-if="log.type === 'unmarkSensitiveDriveFile'">: @{{ log.info.fileUserUsername }}{{ log.info.fileUserHost ? '@' + log.info.fileUserHost : '' }}</span>
 		<span v-else-if="log.type === 'suspendRemoteInstance'">: {{ log.info.host }}</span>
 		<span v-else-if="log.type === 'unsuspendRemoteInstance'">: {{ log.info.host }}</span>
+		<span v-else-if="log.type === 'createGlobalAnnouncement'">: {{ log.info.announcement.title }}</span>
+		<span v-else-if="log.type === 'updateGlobalAnnouncement'">: {{ log.info.before.title }}</span>
+		<span v-else-if="log.type === 'deleteGlobalAnnouncement'">: {{ log.info.announcement.title }}</span>
 		<span v-else-if="log.type === 'createUserAnnouncement'">: @{{ log.info.userUsername }}{{ log.info.userHost ? '@' + log.info.userHost : '' }}</span>
 		<span v-else-if="log.type === 'updateUserAnnouncement'">: @{{ log.info.userUsername }}{{ log.info.userHost ? '@' + log.info.userHost : '' }}</span>
+		<span v-else-if="log.type === 'deleteUserAnnouncement'">: @{{ log.info.userUsername }}{{ log.info.userHost ? '@' + log.info.userHost : '' }}</span>
 		<span v-else-if="log.type === 'deleteNote'">: @{{ log.info.noteUserUsername }}{{ log.info.noteUserHost ? '@' + log.info.noteUserHost : '' }}</span>
 		<span v-else-if="log.type === 'deleteDriveFile'">: @{{ log.info.fileUserUsername }}{{ log.info.fileUserHost ? '@' + log.info.fileUserHost : '' }}</span>
 	</template>
@@ -88,6 +92,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<CodeDiff :context="5" :hideHeader="true" :oldString="JSON5.stringify(log.info.before, null, '\t')" :newString="JSON5.stringify(log.info.after, null, '\t')" language="javascript" maxHeight="300px"/>
 			</div>
 		</template>
+		<template v-else-if="log.type === 'updateGlobalAnnouncement'">
+			<div :class="$style.diff">
+				<CodeDiff :context="5" :hideHeader="true" :oldString="JSON5.stringify(log.info.before, null, '\t')" :newString="JSON5.stringify(log.info.after, null, '\t')" language="javascript" maxHeight="300px"/>
+			</div>
+		</template>
+		<template v-else-if="log.type === 'updateUserAnnouncement'">
+			<div :class="$style.diff">
+				<CodeDiff :context="5" :hideHeader="true" :oldString="JSON5.stringify(log.info.before, null, '\t')" :newString="JSON5.stringify(log.info.after, null, '\t')" language="javascript" maxHeight="300px"/>
+			</div>
+		</template>
 
 		<details>
 			<summary>raw</summary>
diff --git a/packages/misskey-js/src/consts.ts b/packages/misskey-js/src/consts.ts
index 271a64274f..ccc55537d2 100644
--- a/packages/misskey-js/src/consts.ts
+++ b/packages/misskey-js/src/consts.ts
@@ -189,6 +189,9 @@ export type ModerationLogPayloads = {
 	deleteUserAnnouncement: {
 		announcementId: string;
 		announcement: any;
+		userId: string;
+		userUsername: string;
+		userHost: string | null;
 	};
 	resetPassword: {
 		userId: string;