diff --git a/packages/frontend/assets/room/envs/japanese/japanese.blend b/packages/frontend/assets/room/envs/japanese/japanese.blend
index b1090c2f24..57e05d8dcc 100644
Binary files a/packages/frontend/assets/room/envs/japanese/japanese.blend and b/packages/frontend/assets/room/envs/japanese/japanese.blend differ
diff --git a/packages/frontend/assets/room/envs/japanese/japanese.glb b/packages/frontend/assets/room/envs/japanese/japanese.glb
index b371bf2742..2819be7ff6 100644
Binary files a/packages/frontend/assets/room/envs/japanese/japanese.glb and b/packages/frontend/assets/room/envs/japanese/japanese.glb differ
diff --git a/packages/frontend/assets/room/objects/debug-metal/debug-metal.glb b/packages/frontend/assets/room/objects/debug-metal/debug-metal.glb
new file mode 100644
index 0000000000..4827a124c7
Binary files /dev/null and b/packages/frontend/assets/room/objects/debug-metal/debug-metal.glb differ
diff --git a/packages/frontend/src/world/room/object-defs.ts b/packages/frontend/src/world/room/object-defs.ts
index 4da9813771..d1ac9cc47d 100644
--- a/packages/frontend/src/world/room/object-defs.ts
+++ b/packages/frontend/src/world/room/object-defs.ts
@@ -25,6 +25,7 @@ import { cuboid } from './objects/cuboid.js';
 import { cupNoodle } from './objects/cupNoodle.js';
 import { custardPudding } from './objects/custardPudding.js';
 import { debugHipoly } from './objects/debugHipoly.js';
+import { debugMetal } from './objects/debugMetal.js';
 import { descriptionPlate } from './objects/descriptionPlate.js';
 import { desk } from './objects/desk.js';
 import { desktopPc } from './objects/desktopPc.js';
@@ -217,6 +218,7 @@ export const OBJECT_DEFS = [
 	descriptionPlate,
 	stanchionPole,
 	handheldGameConsole,
+	debugMetal,
 ];
 
 export function getObjectDef(type: string): typeof OBJECT_DEFS[number] {
diff --git a/packages/frontend/src/world/room/objects/debugMetal.ts b/packages/frontend/src/world/room/objects/debugMetal.ts
new file mode 100644
index 0000000000..8051f7ae8c
--- /dev/null
+++ b/packages/frontend/src/world/room/objects/debugMetal.ts
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineObject } from '../object.js';
+
+export const debugMetal = defineObject({
+	id: 'debugMetal',
+	name: 'debugMetal',
+	options: {
+		schema: {},
+		default: {},
+	},
+	placement: 'top',
+	hasCollisions: false,
+	canPreMeshesMerging: false,
+	createInstance: () => {
+		return {
+			interactions: {},
+		};
+	},
+});