diff --git a/website/i18n/ja/code.json b/website/i18n/ja/code.json
index 1a4875410..34310b6de 100644
--- a/website/i18n/ja/code.json
+++ b/website/i18n/ja/code.json
@@ -1,6 +1,6 @@
 {
   "theme.ErrorPageContent.title": {
-    "message": "This page crashed.",
+    "message": "ページがクラッシュしました。",
     "description": "The title of the fallback page when the page crashed"
   },
   "theme.ErrorPageContent.tryAgain": {
@@ -24,7 +24,7 @@
     "description": "The ARIA label for close button of announcement bar"
   },
   "theme.BackToTopButton.buttonAriaLabel": {
-    "message": "Scroll back to top",
+    "message": "ページの先頭に戻る",
     "description": "The ARIA label for the back to top button"
   },
   "theme.blog.archive.title": {
@@ -192,15 +192,15 @@
     "description": "The ARIA label for the link to full blog posts from excerpts"
   },
   "theme.colorToggle.ariaLabel": {
-    "message": "Switch between dark and light mode (currently {mode})",
+    "message": "ダークモードとライトモードを切り替える (現在は {mode})",
     "description": "The ARIA label for the navbar color mode toggle"
   },
   "theme.colorToggle.ariaLabel.mode.dark": {
-    "message": "dark mode",
+    "message": "ダークモード",
     "description": "The name for the dark color mode"
   },
   "theme.colorToggle.ariaLabel.mode.light": {
-    "message": "light mode",
+    "message": "ライトモード",
     "description": "The name for the light color mode"
   },
   "theme.docs.versionBadge.label": {
@@ -226,7 +226,7 @@
     "message": "See all results"
   },
   "theme.SearchBar.label": {
-    "message": "Search",
+    "message": "検索",
     "description": "The ARIA label and placeholder for search button"
   },
   "theme.SearchPage.existingResultsTitle": {
@@ -242,7 +242,7 @@
     "description": "Pluralized label for \"{count} documents found\". Use as much plural forms (separated by \"|\") as your language support (see https://www.unicode.org/cldr/cldr-aux/charts/34/supplemental/language_plural_rules.html)"
   },
   "theme.SearchPage.noResultsText": {
-    "message": "No documents were found",
+    "message": "見つかりませんでした。",
     "description": "The paragraph for empty search result"
   },
   "theme.admonition.note": {
@@ -262,7 +262,7 @@
     "description": "The default label used for the Info admonition (:::info)"
   },
   "theme.admonition.caution": {
-    "message": "caution",
+    "message": "注意",
     "description": "The default label used for the Caution admonition (:::caution)"
   },
   "theme.tags.tagsPageTitle": {
@@ -297,6 +297,14 @@
     "message": "Collapse sidebar category '{label}'",
     "description": "The ARIA label to collapse the sidebar category"
   },
+  "theme.unlistedContent.title": {
+    "message": "非公開のページ",
+    "description": "The unlisted content banner title"
+  },
+  "theme.unlistedContent.message": {
+    "message": "このページは限定公開です。検索エンジンには表示されません。リンクを持っているユーザーのみアクセスできます。",
+    "description": "The unlisted content banner message"
+  },
   "theme.SearchPage.inputPlaceholder": {
     "message": "検索するキーワードを入力してください",
     "description": "The placeholder for search page input"
@@ -430,11 +438,11 @@
     "description": "The unlisted content banner message"
   },
   "theme.contentVisibility.draftBanner.title": {
-    "message": "Draft page",
+    "message": "下書きページ",
     "description": "The draft content banner title"
   },
   "theme.contentVisibility.draftBanner.message": {
-    "message": "This page is a draft. It will only be visible in dev and be excluded from the production build.",
+    "message": "このページは下書きです。開発環境でのみ表示され、本番ビルドからは除外されます。",
     "description": "The draft content banner message"
   },
   "theme.blog.author.noPosts": {