diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef9934f6d1..d2889b07bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 ### Improvements
 - クライアント: ユーザーのリアクション一覧を見れるように
 - クライアント: ユーザー検索の精度を強化
+- クライアント: 新しいライトテーマを追加
 - API: ユーザーのリアクション一覧を取得する users/reactions を追加
 - API: users/search および users/search-by-username-and-host を強化
 
diff --git a/src/client/scripts/theme.ts b/src/client/scripts/theme.ts
index e79d54fa6d..ad1b033edf 100644
--- a/src/client/scripts/theme.ts
+++ b/src/client/scripts/theme.ts
@@ -20,6 +20,7 @@ export const builtinThemes = [
 	require('@client/themes/l-apricot.json5'),
 	require('@client/themes/l-rainy.json5'),
 	require('@client/themes/l-vivid.json5'),
+	require('@client/themes/l-sushi.json5'),
 
 	require('@client/themes/d-dark.json5'),
 	require('@client/themes/d-persimmon.json5'),
diff --git a/src/client/themes/l-sushi.json5 b/src/client/themes/l-sushi.json5
new file mode 100644
index 0000000000..5846927d65
--- /dev/null
+++ b/src/client/themes/l-sushi.json5
@@ -0,0 +1,18 @@
+{
+	id: '213273e5-7d20-d5f0-6e36-1b6a4f67115c',
+
+	name: 'Mi Sushi Light',
+	author: 'syuilo',
+
+	base: 'light',
+
+	props: {
+		accent: '#e36749',
+		bg: '#f0eee9',
+		fg: '#5f5f5f',
+		renote: '@accent',
+		link: '@accent',
+		mention: '@accent',
+		hashtag: '#229e82',
+	},
+}