diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 897fa75436..e6272e4946 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -3717,7 +3717,7 @@ _miRoom:
       height: "高さ"
       width: "幅"
     hangingTShirt: "吊り下げTシャツ"
-    icosahedron: "正二十面体"
+    icosahedron: "正二十面体のオブジェ"
     _icosahedron:
       mat: "素材"
     ironFrameTable: "アイアンフレームテーブル"
diff --git a/packages/frontend-misskey-world-engine/src/room/engine.ts b/packages/frontend-misskey-world-engine/src/room/engine.ts
index e312aba330..5bd1a858d8 100644
--- a/packages/frontend-misskey-world-engine/src/room/engine.ts
+++ b/packages/frontend-misskey-world-engine/src/room/engine.ts
@@ -65,6 +65,7 @@ export class RoomEngine extends EngineBase<{
 	'changeSittingState': (ctx: { isSitting: boolean }) => void;
 	'changeGridSnapping': (ctx: { gridSnapping: { enabled: boolean; scale: number } }) => void;
 	'changeRoomState': (ctx: { roomState: RoomState }) => void;
+	'changeMyPlayerState': (ctx: { playerState: PlayerState }) => void;
 	'playSfxUrl': (ctx: {
 		url: string;
 		options: {
diff --git a/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.blend b/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.blend
deleted file mode 100644
index 6c09067e78..0000000000
Binary files a/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.blend and /dev/null differ
diff --git a/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.glb b/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.glb
deleted file mode 100644
index d640df9b06..0000000000
Binary files a/packages/frontend/assets/room/objects/rubik-cube/rubik-cube.glb and /dev/null differ
diff --git a/packages/frontend/src/pages/rooms/room.core.vue b/packages/frontend/src/pages/rooms/room.core.vue
index 4cbae66868..d452b25aa0 100644
--- a/packages/frontend/src/pages/rooms/room.core.vue
+++ b/packages/frontend/src/pages/rooms/room.core.vue
@@ -91,6 +91,7 @@ import * as Misskey from 'misskey-js';
 import { cm, getHex, getRgb, WORLD_SCALE } from 'misskey-world/src/utility.js';
 import { GRAPHICS_QUALITY } from 'misskey-world-engine/src/room/utility.js';
 import { OBJECT_SCHEMA_DEFS } from 'misskey-world/src/room/object-schema-defs.js';
+import { useInterval } from '@@/js/use-interval.js';
 import XObjectCustomizeForm from './room.object-customize-form.vue';
 import XEnvOptions from './room.env-options.vue';
 import type { RoomControllerOptions } from '@/world/room/controller.js';
@@ -346,6 +347,10 @@ onMounted(async () => {
 	(window as any).disableGlobalHotkeys();
 });
 
+useInterval(() => {
+	multiplayer.updateState(controller.myPlayerState.value);
+}, 1000, { immediate: false, afterMounted: true });
+
 onDeactivated(() => {
 	controller.destroy();
 	multiplayer.dispose();
diff --git a/packages/frontend/src/world/room/controller.ts b/packages/frontend/src/world/room/controller.ts
index 1ff3c2de6b..090b0121a6 100644
--- a/packages/frontend/src/world/room/controller.ts
+++ b/packages/frontend/src/world/room/controller.ts
@@ -10,6 +10,7 @@ import type { ShallowRef } from 'vue';
 import type { RoomStateObject } from 'misskey-world/src/room/object.js';
 import type { RoomEngine } from 'misskey-world-engine/src/room/engine.js';
 import type { RoomAttachments, RoomState } from 'misskey-world/src/room/type.js';
+import type { PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
 import * as sound from '@/utility/sound.js';
 import { deepEqual } from '@/utility/deep-equal.js';
 import { deepClone } from '@/utility/clone.js';
@@ -40,6 +41,10 @@ export class RoomController extends EngineControllerBase<RoomEngine> {
 		}[];
 	} | null>(null);
 	public roomState: ShallowRef<RoomState>;
+	public myPlayerState = shallowRef<PlayerState>({
+		position: [0, 0, 0],
+		rotation: [0, 0, 0],
+	});
 
 	constructor(roomState: RoomState, options: RoomControllerOptions) {
 		super(options);
@@ -103,6 +108,10 @@ export class RoomController extends EngineControllerBase<RoomEngine> {
 			}
 		});
 
+		engineEvents.on('changeMyPlayerState', ({ playerState }) => {
+			this.myPlayerState.value = playerState;
+		});
+
 		engineEvents.on('playSfxUrl', ({ url, options }) => {
 			sound.playUrl(url, options);
 		});
@@ -117,6 +126,10 @@ export class RoomController extends EngineControllerBase<RoomEngine> {
 		this.isRoomLightOn.value = true;
 		this.grabbing.value = null;
 		this.selected.value = null;
+		this.myPlayerState.value = {
+			position: [0, 0, 0],
+			rotation: [0, 0, 0],
+		};
 		await this.init(canvas, attachments);
 	}
 
diff --git a/packages/frontend/src/world/room/multiplayer.ts b/packages/frontend/src/world/room/multiplayer.ts
index c0f7a06200..64cc785518 100644
--- a/packages/frontend/src/world/room/multiplayer.ts
+++ b/packages/frontend/src/world/room/multiplayer.ts
@@ -10,6 +10,7 @@ import type { PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
 import { useStream } from '@/stream.js';
 import * as os from '@/os.js';
 import { withTimeout } from '@/utility/promise-timeout.js';
+import { deepEqual } from '@/utility/deep-equal.js';
 
 export class Multiplayer {
 	public isOnline = ref(false);
@@ -48,9 +49,14 @@ export class Multiplayer {
 		this.isOnline.value = false;
 	}
 
+	private prevState: PlayerState | null = null;
+
 	public updateState(state: PlayerState) {
 		if (this.connection == null || !this.isOnline.value) return;
+		if (this.prevState != null && deepEqual(this.prevState, state)) return;
+
 		this.connection.send('update', state);
+		this.prevState = state;
 	}
 
 	private onSync(states: Record<string, PlayerState>) {
diff --git a/packages/i18n/src/autogen/locale.ts b/packages/i18n/src/autogen/locale.ts
index 768de9673c..8878e15f6f 100644
--- a/packages/i18n/src/autogen/locale.ts
+++ b/packages/i18n/src/autogen/locale.ts
@@ -13854,7 +13854,7 @@ export interface Locale extends ILocale {
              */
             "hangingTShirt": string;
             /**
-             * 正二十面体
+             * 正二十面体のオブジェ
              */
             "icosahedron": string;
             "_icosahedron": {