diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 5eb3d736f2..33d7e760a0 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -716,6 +716,7 @@ goBack: "戻る"
 unlikeConfirm: "いいね解除しますか？"
 fullView: "フルビュー"
 quitFullView: "フルビュー解除"
+addDescription: "説明を追加"
 
 _email:
   _follow:
@@ -884,6 +885,7 @@ _theme:
   install: "テーマのインストール"
   manage: "テーマの管理"
   code: "テーマコード"
+  description: "説明"
   installed: "{name}をインストールしました"
   installedThemes: "インストールされたテーマ"
   builtinThemes: "標準のテーマ"
diff --git a/src/client/pages/settings/theme.manage.vue b/src/client/pages/settings/theme.manage.vue
index 6f5a946e0b..ea9d5949ff 100644
--- a/src/client/pages/settings/theme.manage.vue
+++ b/src/client/pages/settings/theme.manage.vue
@@ -13,6 +13,9 @@
 		<FormInput readonly :value="selectedTheme.author">
 			<span>{{ $ts.author }}</span>
 		</FormInput>
+		<FormTextarea readonly :value="selectedTheme.desc" v-if="selectedTheme.desc">
+			<span>{{ $ts._theme.description }}</span>
+		</FormTextarea>
 		<FormTextarea readonly tall :value="selectedThemeCode">
 			<span>{{ $ts._theme.code }}</span>
 			<template #desc><button @click="copyThemeCode()" class="_textButton">{{ $ts.copy }}</button></template>
diff --git a/src/client/pages/theme-editor.vue b/src/client/pages/theme-editor.vue
index 0558451e2c..db273746a8 100644
--- a/src/client/pages/theme-editor.vue
+++ b/src/client/pages/theme-editor.vue
@@ -35,6 +35,7 @@
 			</div>
 		</div>
 	</div>
+
 	<FormGroup v-if="codeEnabled">
 		<FormTextarea v-model:value="themeCode" tall>
 			<span>{{ $ts._theme.code }}</span>
@@ -42,6 +43,14 @@
 		<FormButton @click="applyThemeCode" primary>{{ $ts.apply }}</FormButton>
 	</FormGroup>
 	<FormButton v-else @click="codeEnabled = true"><Fa :icon="faCode"/> {{ $ts.editCode }}</FormButton>
+
+	<FormGroup v-if="descriptionEnabled">
+		<FormTextarea v-model:value="description">
+			<span>{{ $ts._theme.description }}</span>
+		</FormTextarea>
+	</FormGroup>
+	<FormButton v-else @click="descriptionEnabled = true">{{ $ts.addDescription }}</FormButton>
+
 	<FormGroup>
 		<FormButton @click="showPreview"><Fa :icon="faEye"/> {{ $ts.preview }}</FormButton>
 		<FormButton @click="saveAs" primary><Fa :icon="faSave"/> {{ $ts.saveAs }}</FormButton>
@@ -88,6 +97,8 @@ export default defineComponent({
 				props: lightTheme.props
 			} as Theme,
 			codeEnabled: false,
+			descriptionEnabled: false,
+			description: null,
 			themeCode: null,
 			bgColors: [
 				{ color: '#f5f5f5', kind: 'light', forPreview: '#f5f5f5' },
@@ -218,6 +229,7 @@ export default defineComponent({
 			this.theme.id = uuid();
 			this.theme.name = name;
 			this.theme.author = `@${this.$i.username}@${toUnicode(host)}`;
+			if (this.description) this.theme.desc = this.description;
 			addTheme(this.theme);
 			applyTheme(this.theme);
 			if (this.$store.state.darkMode) {