diff --git a/locales/index.d.ts b/locales/index.d.ts
index b54763a8a2..1f55a3ca0f 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -12341,6 +12341,14 @@ export interface Locale extends ILocale {
          * 敷き詰める
          */
         "repeat": string;
+        /**
+         * 回転した分の面積を確保する
+         */
+        "preserveBoundingRect": string;
+        /**
+         * 通常はオンで問題ありません。ウォーターマークを回転させた際に余白が不自然になった場合はオフにしてみてください。
+         */
+        "preserveBoundingRectDescription": string;
         /**
          * 不透明度
          */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 3c9f0a5853..d8cdc4dcd9 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -3304,6 +3304,8 @@ _watermarkEditor:
   title: "ウォーターマークの編集"
   cover: "全体に被せる"
   repeat: "敷き詰める"
+  preserveBoundingRect: "回転した分の面積を確保する"
+  preserveBoundingRectDescription: "通常はオンで問題ありません。ウォーターマークを回転させた際に余白が不自然になった場合はオフにしてみてください。"
   opacity: "不透明度"
   scale: "サイズ"
   text: "テキスト"
diff --git a/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue b/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
index 288293db3f..11f1d484ad 100644
--- a/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
+++ b/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
@@ -65,6 +65,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkSwitch v-model="layer.repeat">
 			<template #label>{{ i18n.ts._watermarkEditor.repeat }}</template>
 		</MkSwitch>
+
+		<MkSwitch v-model="layerPreserveBoundingRect">
+			<template #label>{{ i18n.ts._watermarkEditor.preserveBoundingRect }}</template>
+			<template #caption>{{ i18n.ts._watermarkEditor.preserveBoundingRectDescription }}</template>
+		</MkSwitch>
 	</template>
 
 	<template v-else-if="layer.type === 'image'">
@@ -129,6 +134,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkSwitch v-model="layer.cover">
 			<template #label>{{ i18n.ts._watermarkEditor.cover }}</template>
 		</MkSwitch>
+
+		<MkSwitch v-model="layerPreserveBoundingRect">
+			<template #label>{{ i18n.ts._watermarkEditor.preserveBoundingRect }}</template>
+			<template #caption>{{ i18n.ts._watermarkEditor.preserveBoundingRectDescription }}</template>
+		</MkSwitch>
 	</template>
 
 	<template v-else-if="layer.type === 'qr'">
@@ -335,7 +345,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted } from 'vue';
+import { ref, onMounted, computed } from 'vue';
 import * as Misskey from 'misskey-js';
 import type { WatermarkPreset } from '@/utility/watermark.js';
 import { i18n } from '@/i18n.js';
@@ -351,6 +361,20 @@ import { misskeyApi } from '@/utility/misskey-api.js';
 
 const layer = defineModel<WatermarkPreset['layers'][number]>('layer', { required: true });
 
+const layerPreserveBoundingRect = computed({
+	get: () => {
+		if (layer.value.type === 'text' || layer.value.type === 'image') {
+			return !layer.value.noBoundingBoxExpansion;
+		}
+		return false;
+	},
+	set: (v: boolean) => {
+		if (layer.value.type === 'text' || layer.value.type === 'image') {
+			layer.value.noBoundingBoxExpansion = !v;
+		}
+	},
+});
+
 const driveFile = ref<Misskey.entities.DriveFile | null>(null);
 const driveFileError = ref(false);
 onMounted(async () => {
diff --git a/packages/frontend/src/components/MkWatermarkEditorDialog.vue b/packages/frontend/src/components/MkWatermarkEditorDialog.vue
index 0d0488d9bc..30aa43aba4 100644
--- a/packages/frontend/src/components/MkWatermarkEditorDialog.vue
+++ b/packages/frontend/src/components/MkWatermarkEditorDialog.vue
@@ -90,6 +90,7 @@ function createTextLayer(): WatermarkPreset['layers'][number] {
 		angle: 0,
 		opacity: 0.75,
 		repeat: false,
+		noBoundingBoxExpansion: false,
 	};
 }
 
@@ -104,6 +105,7 @@ function createImageLayer(): WatermarkPreset['layers'][number] {
 		angle: 0,
 		opacity: 0.75,
 		repeat: false,
+		noBoundingBoxExpansion: false,
 		cover: false,
 	};
 }
@@ -261,7 +263,7 @@ async function initRenderer() {
 
 	await renderer!.setLayers(preset.layers);
 
-	renderer!.render();
+	await renderer!.render();
 }
 
 onMounted(async () => {
diff --git a/packages/frontend/src/utility/watermark.ts b/packages/frontend/src/utility/watermark.ts
index b3525f158f..1b46721a2b 100644
--- a/packages/frontend/src/utility/watermark.ts
+++ b/packages/frontend/src/utility/watermark.ts
@@ -27,6 +27,7 @@ export type WatermarkPreset = {
 		type: 'text';
 		text: string;
 		repeat: boolean;
+		noBoundingBoxExpansion: boolean;
 		scale: number;
 		angle: number;
 		align: Align;
@@ -38,6 +39,7 @@ export type WatermarkPreset = {
 		imageId: string | null;
 		cover: boolean;
 		repeat: boolean;
+		noBoundingBoxExpansion: boolean;
 		scale: number;
 		angle: number;
 		align: Align;
@@ -106,6 +108,7 @@ export class WatermarkRenderer {
 					id: layer.id,
 					params: {
 						repeat: layer.repeat,
+						noBoundingBoxExpansion: layer.noBoundingBoxExpansion,
 						scale: layer.scale,
 						align: layer.align,
 						angle: layer.angle,
@@ -123,6 +126,7 @@ export class WatermarkRenderer {
 					id: layer.id,
 					params: {
 						repeat: layer.repeat,
+						noBoundingBoxExpansion: layer.noBoundingBoxExpansion,
 						scale: layer.scale,
 						align: layer.align,
 						angle: layer.angle,