diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 23a2f64d06..ca98e7fe28 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -828,6 +828,8 @@ desktop/views/components/settings.vue:
   note-visibility: "投稿の公開範囲"
   default-note-visibility: "デフォルトの公開範囲"
   remember-note-visibility: "投稿の公開範囲を記憶する"
+  web-search-engine: "ウェブ検索エンジン"
+  web-search-engine-desc: "例: https://www.google.com/?#q={{query}}"
   auto-popout: "ウィンドウの自動ポップアウト"
   auto-popout-desc: "ウィンドウが開かれるとき、ポップアウト(ブラウザ外に切り離す)可能なら自動でポップアウトします。この設定はブラウザに記憶されます。"
   advanced: "詳細設定"
@@ -1577,6 +1579,8 @@ mobile/views/pages/settings.vue:
   note-visibility: "投稿の公開範囲"
   default-note-visibility: "デフォルトの公開範囲"
   remember-note-visibility: "投稿の公開範囲を記憶する"
+  web-search-engine: "ウェブ検索エンジン"
+  web-search-engine-desc: "例: https://www.google.com/?#q={{query}}"
   disable-via-mobile: "「モバイルからの投稿」フラグを付けない"
   load-raw-images: "添付された画像を高画質で表示する"
   load-remote-media: "リモートサーバーのメディアを表示する"
diff --git a/src/client/app/common/views/components/google.vue b/src/client/app/common/views/components/google.vue
index 1d852cf25a..dab2e6824a 100644
--- a/src/client/app/common/views/components/google.vue
+++ b/src/client/app/common/views/components/google.vue
@@ -22,7 +22,10 @@ export default Vue.extend({
 	},
 	methods: {
 		search() {
-			window.open(`https://www.google.com/?#q=${this.query}`, '_blank');
+			const engine = this.$store.state.settings.webSearchEngine ||
+				'https://www.google.com/?#q={{query}}';
+			const url = engine.replace('{{query}}', this.query)
+			window.open(url, '_blank');
 		}
 	}
 });
diff --git a/src/client/app/desktop/views/components/settings.vue b/src/client/app/desktop/views/components/settings.vue
index 62106768b5..a474a50159 100644
--- a/src/client/app/desktop/views/components/settings.vue
+++ b/src/client/app/desktop/views/components/settings.vue
@@ -91,6 +91,11 @@
 					</ui-select>
 				</section>
 			</section>
+
+			<section>
+				<header>{{ $t('web-search-engine') }}</header>
+				<ui-input v-model="webSearchEngine">{{ $t('web-search-engine') }}<span slot="desc">{{ $t('web-search-engine-desc') }}</span></ui-input>
+			</section>
 		</ui-card>
 
 		<ui-card class="web" v-show="page == 'web'">
@@ -455,6 +460,11 @@ export default Vue.extend({
 			set(value) { this.$store.dispatch('settings/set', { key: 'defaultNoteVisibility', value }); }
 		},
 
+		webSearchEngine: {
+			get() { return this.$store.state.settings.webSearchEngine; },
+			set(value) { this.$store.dispatch('settings/set', { key: 'webSearchEngine', value }); }
+		},
+
 		showReplyTarget: {
 			get() { return this.$store.state.settings.showReplyTarget; },
 			set(value) { this.$store.dispatch('settings/set', { key: 'showReplyTarget', value }); }
diff --git a/src/client/app/mobile/views/pages/settings.vue b/src/client/app/mobile/views/pages/settings.vue
index 0f54933925..8b6d0e79d2 100644
--- a/src/client/app/mobile/views/pages/settings.vue
+++ b/src/client/app/mobile/views/pages/settings.vue
@@ -86,6 +86,11 @@
 						</ui-select>
 					</section>
 				</section>
+
+				<section>
+					<header>{{ $t('web-search-engine') }}</header>
+					<ui-input v-model="webSearchEngine">{{ $t('web-search-engine') }}<span slot="desc">{{ $t('web-search-engine-desc') }}</span></ui-input>
+				</section>
 			</ui-card>
 
 			<x-drive-settings/>
@@ -365,6 +370,11 @@ export default Vue.extend({
 			get() { return this.$store.state.settings.defaultNoteVisibility; },
 			set(value) { this.$store.dispatch('settings/set', { key: 'defaultNoteVisibility', value }); }
 		},
+
+		webSearchEngine: {
+			get() { return this.$store.state.settings.webSearchEngine; },
+			set(value) { this.$store.dispatch('settings/set', { key: 'webSearchEngine', value }); }
+		},
 	},
 
 	mounted() {
diff --git a/src/client/app/store.ts b/src/client/app/store.ts
index a498b0138f..159ed994cf 100644
--- a/src/client/app/store.ts
+++ b/src/client/app/store.ts
@@ -35,6 +35,7 @@ const defaultSettings = {
 	iLikeSushi: false,
 	rememberNoteVisibility: false,
 	defaultNoteVisibility: 'public',
+	webSearchEngine: 'https://www.google.com/?#q={{query}}',
 	mutedWords: [],
 	games: {
 		reversi: {