diff --git a/ui/src/i18n/.i18n/ja-JP.meta.json b/ui/src/i18n/.i18n/ja-JP.meta.json
index cbc49468a00f..2418da31a2d8 100644
--- a/ui/src/i18n/.i18n/ja-JP.meta.json
+++ b/ui/src/i18n/.i18n/ja-JP.meta.json
@@ -1,13 +1,11 @@
 {
-  "fallbackKeys": [
-    "chat.sidebar.allSessions"
-  ],
-  "generatedAt": "2026-07-02T21:47:27.169Z",
+  "fallbackKeys": [],
+  "generatedAt": "2026-07-03T07:37:27.370Z",
   "locale": "ja-JP",
-  "model": "claude-opus-4-8",
-  "provider": "anthropic",
+  "model": "gpt-5.5",
+  "provider": "openai",
   "sourceHash": "f457ef4a415e1348150b8bb0850858d69fb802331e8ce40ea905872b06f33f35",
   "totalKeys": 1422,
-  "translatedKeys": 1421,
+  "translatedKeys": 1422,
   "workflow": 1
 }
diff --git a/ui/src/i18n/.i18n/ja-JP.tm.jsonl b/ui/src/i18n/.i18n/ja-JP.tm.jsonl
index 21e6b03d43fc..403f8300e49f 100644
--- a/ui/src/i18n/.i18n/ja-JP.tm.jsonl
+++ b/ui/src/i18n/.i18n/ja-JP.tm.jsonl
@@ -7,6 +7,7 @@
 {"cache_key":"0b186c6ce4e7be3cef7a0a7aa338fe0a5f68a091cfbd24eeb2b359a59177c907","model":"claude-opus-4-8","provider":"anthropic","segment_id":"workboard.autoRefresh","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"Auto-refresh","text_hash":"9ea4d7fd1550f0866089d18b1344546bfed91502b41c0484d6023ceb0fdeb75c","tgt_lang":"ja-JP","translated":"自動更新","updated_at":"2026-06-17T14:14:04.173Z"}
 {"cache_key":"11a891277b97903cbca169aebb523895b61151412e09a88cc5530ffb1dbf0d67","model":"claude-opus-4-8","provider":"anthropic","segment_id":"workboard.viewRunning","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"Running","text_hash":"f4ccae29e1bb0c20a124570a1b43f4347ea94bba9f84ffdfddd9c7445b126128","tgt_lang":"ja-JP","translated":"実行中","updated_at":"2026-06-17T14:14:04.173Z"}
 {"cache_key":"130a12035aed62707b508a46e200295409fc1211f5efa9e4546b322ad191f30e","model":"claude-opus-4-8","provider":"anthropic","segment_id":"workboard.dependenciesReadyTitle","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"{count} dependencies are done.","text_hash":"559fe92cd5fe39b4f511a146fc7ce6b51e7f528e1d388bbfde1d85dddb60604d","tgt_lang":"ja-JP","translated":"{count} 件の依存関係が完了しました。","updated_at":"2026-06-16T14:14:13.256Z"}
+{"cache_key":"138ec9c304e201adad179b6a7bbe3f12ed5166db6b56df3a9ad82773190fa9f9","model":"gpt-5.5","provider":"openai","segment_id":"chat.sidebar.allSessions","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"All sessions","text_hash":"78648d4d66499d8dc19049a4e3bad87b404f99ea7a7f125ced52546e2d92bb79","tgt_lang":"ja-JP","translated":"すべてのセッション","updated_at":"2026-07-03T07:37:27.363Z"}
 {"cache_key":"140af54becac1cfc2465aaae072f5bf08674a596f71757c48b65ccb96b4ea858","model":"claude-opus-4-8","provider":"anthropic","segment_id":"workboard.dependenciesBlockedTitle","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"Waiting on dependencies: {parents}.","text_hash":"50fb8f9b1326b69bd67d25583ddb4f70b9d75ae6e3ff8a9056a9361daa4b7d8b","tgt_lang":"ja-JP","translated":"依存関係を待機中: {parents}。","updated_at":"2026-06-16T14:14:13.256Z"}
 {"cache_key":"1481816a7294f9574362957020b183e511a492eb920aef062d5986f078228c54","model":"gpt-5.5","provider":"openai","segment_id":"subtitles.skillWorkshop","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"Review, refine, and apply proposals before they become live skills.","text_hash":"f907c72e9f18a205027257cd6fecdd52b03732227a17dcec0db038e11de3f8cc","tgt_lang":"ja-JP","translated":"提案がライブスキルになる前に、確認、調整、適用します。","updated_at":"2026-05-31T21:48:21.745Z"}
 {"cache_key":"15b9f8eec10eb8ed08808b744780e6396c49b2c110b1809c8b5821983eec7943","model":"claude-opus-4-8","provider":"anthropic","segment_id":"workboard.detailTask","source_path":"ui/src/i18n/locales/ja-JP.ts","src_lang":"en","text":"Gateway task","text_hash":"6696e7c592238747dd39d7ba000db600a92f843add73ee90b028c72a2dfd37dd","tgt_lang":"ja-JP","translated":"Gateway タスク","updated_at":"2026-06-16T14:14:04.101Z"}
diff --git a/ui/src/i18n/locales/ja-JP.ts b/ui/src/i18n/locales/ja-JP.ts
index d491a72a09f9..2347f4e25ef3 100644
--- a/ui/src/i18n/locales/ja-JP.ts
+++ b/ui/src/i18n/locales/ja-JP.ts
@@ -1355,7 +1355,7 @@ export const ja_JP: TranslationMap = {
     dismissUpdateBanner: "更新バナーを閉じる",
     switchedSession: "{session} に切り替えました",
     sidebar: {
-      allSessions: "All sessions",
+      allSessions: "すべてのセッション",
     },
     welcome: {
       ready: "Ready to chat",