diff --git a/.vitepress/config/ja.ts b/.vitepress/config/ja.ts
index 260e8dc..f3e6903 100644
--- a/.vitepress/config/ja.ts
+++ b/.vitepress/config/ja.ts
@@ -56,3 +56,25 @@ export const ja = defineConfig({
         returnToTopLabel: 'ページの先頭に戻る',    
     },
 });
+
+export const jaSearchLocale: NonNullable<DefaultTheme.LocalSearchOptions['translations']> = {
+    button: {
+        buttonText: '検索',
+        buttonAriaLabel: '検索する',
+    },
+    modal: {
+        displayDetails: '詳細を表示',
+        resetButtonTitle: 'リセット',
+        backButtonTitle: '閉じる',
+        noResultsText: '該当する結果がありませんでした',
+        footer: {
+            selectText: 'で選択',
+            selectKeyAriaLabel: 'Enterキー',
+            navigateText: 'で移動',
+            navigateUpKeyAriaLabel: '上矢印キー',
+            navigateDownKeyAriaLabel: '下矢印キー',
+            closeText: 'で閉じる',
+            closeKeyAriaLabel: '閉じる',
+        },
+    },
+};
diff --git a/.vitepress/config/shared.ts b/.vitepress/config/shared.ts
index 7fe56fc..0769f33 100644
--- a/.vitepress/config/shared.ts
+++ b/.vitepress/config/shared.ts
@@ -1,5 +1,6 @@
 import { defineConfig } from 'vitepress';
 import aiscriptTmLanguage from 'aiscript-vscode/aiscript/syntaxes/aiscript.tmLanguage.json' with { type: 'json' };
+import { jaSearchLocale } from './ja';
 import { createPlaygroundTransformer } from '../scripts/playground-transformer';
 
 // https://vitepress.dev/reference/site-config
@@ -12,6 +13,16 @@ export const shared = defineConfig({
         socialLinks: [
             { icon: 'github', link: 'https://github.com/aiscript-dev/aiscript' },
         ],
+        search: {
+            provider: 'local',
+            options: {
+                locales: {
+                    ja: {
+                        translations: jaSearchLocale,
+                    },
+                }
+            }
+        },
     },
 
     head: [