diff --git a/packages/frontend/assets/room/rooms/default/300.glb b/packages/frontend/assets/room/rooms/default/300.glb
index e63d059208..c4729c1e68 100644
Binary files a/packages/frontend/assets/room/rooms/default/300.glb and b/packages/frontend/assets/room/rooms/default/300.glb differ
diff --git a/packages/frontend/assets/room/rooms/default/default.blend b/packages/frontend/assets/room/rooms/default/default.blend
index e63910be84..6d5ee65cce 100644
Binary files a/packages/frontend/assets/room/rooms/default/default.blend and b/packages/frontend/assets/room/rooms/default/default.blend differ
diff --git a/packages/frontend/src/pages/room.default-heya-options.vue b/packages/frontend/src/pages/room.default-heya-options.vue
index a6d01ad26b..93c75aa1e8 100644
--- a/packages/frontend/src/pages/room.default-heya-options.vue
+++ b/packages/frontend/src/pages/room.default-heya-options.vue
@@ -7,23 +7,55 @@ SPDX-License-Identifier: AGPL-3.0-only
 <div :class="$style.root">
 	<div class="_gaps">
 		<MkFolder>
-			<template #label>Wall N</template>
-			<XWallOption :options="options.walls.n" @update="v => { update({ walls: { ...options.walls, n: v } }); }"></XWallOption>
+			<template #label>Walls</template>
+
+			<div class="_gaps_s">
+				<MkFolder>
+					<template #label>Wall N</template>
+					<XWallOption :options="options.walls.n" @update="v => { update({ walls: { ...options.walls, n: v } }); }"></XWallOption>
+				</MkFolder>
+
+				<MkFolder>
+					<template #label>Wall S</template>
+					<XWallOption :options="options.walls.s" @update="v => { update({ walls: { ...options.walls, s: v } }); }"></XWallOption>
+				</MkFolder>
+
+				<MkFolder>
+					<template #label>Wall W</template>
+					<XWallOption :options="options.walls.w" @update="v => { update({ walls: { ...options.walls, w: v } }); }"></XWallOption>
+				</MkFolder>
+
+				<MkFolder>
+					<template #label>Wall E</template>
+					<XWallOption :options="options.walls.e" @update="v => { update({ walls: { ...options.walls, e: v } }); }"></XWallOption>
+				</MkFolder>
+			</div>
 		</MkFolder>
 
 		<MkFolder>
-			<template #label>Wall S</template>
-			<XWallOption :options="options.walls.s" @update="v => { update({ walls: { ...options.walls, s: v } }); }"></XWallOption>
-		</MkFolder>
+			<template #label>Pillars</template>
 
-		<MkFolder>
-			<template #label>Wall W</template>
-			<XWallOption :options="options.walls.w" @update="v => { update({ walls: { ...options.walls, w: v } }); }"></XWallOption>
-		</MkFolder>
+			<div class="_gaps_s">
+				<MkFolder>
+					<template #label>Pillar NW</template>
+					<XPillarOption :options="options.pillars.nw" @update="v => { update({ pillars: { ...options.pillars, nw: v } }); }"></XPillarOption>
+				</MkFolder>
 
-		<MkFolder>
-			<template #label>Wall E</template>
-			<XWallOption :options="options.walls.e" @update="v => { update({ walls: { ...options.walls, e: v } }); }"></XWallOption>
+				<MkFolder>
+					<template #label>Pillar NE</template>
+					<XPillarOption :options="options.pillars.ne" @update="v => { update({ pillars: { ...options.pillars, ne: v } }); }"></XPillarOption>
+				</MkFolder>
+
+				<MkFolder>
+					<template #label>Pillar SW</template>
+					<XPillarOption :options="options.pillars.sw" @update="v => { update({ pillars: { ...options.pillars, sw: v } }); }"></XPillarOption>
+				</MkFolder>
+
+				<MkFolder>
+					<template #label>Pillar SE</template>
+					<XPillarOption :options="options.pillars.se" @update="v => { update({ pillars: { ...options.pillars, se: v } }); }"></XPillarOption>
+				</MkFolder>
+			</div>
 		</MkFolder>
 
 		<MkFolder>
@@ -64,6 +96,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { computed, defineAsyncComponent, nextTick, onMounted, onUnmounted, ref, shallowRef, useTemplateRef, watch } from 'vue';
 import XWallOption from './room.default-heya-wall-options.vue';
+import XPillarOption from './room.default-heya-pillar-options.vue';
 import type { ObjectDef } from '@/world/room/object.js';
 import type { SimpleHeyaOptions } from '@/world/room/heya.js';
 import { i18n } from '@/i18n.js';
diff --git a/packages/frontend/src/pages/room.default-heya-pillar-options.vue b/packages/frontend/src/pages/room.default-heya-pillar-options.vue
new file mode 100644
index 0000000000..1e2f13f730
--- /dev/null
+++ b/packages/frontend/src/pages/room.default-heya-pillar-options.vue
@@ -0,0 +1,57 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.root">
+	<div class="_gaps">
+		<MkSelect
+			:items="[
+				{ label: 'None', value: null },
+				{ label: 'Wood', value: 'wood' },
+				{ label: 'Concrete', value: 'concrete' },
+			]" :modelValue="options.material" @update:modelValue="v => { update({ material: v }); }"
+		>
+			<template #label>wallpaper</template>
+		</MkSelect>
+		<MkInput :modelValue="getHex(options.color)" type="color" @update:modelValue="v => { const c = getRgb(v); if (c != null) update({ color: c }); }">
+			<template #label>color</template>
+		</MkInput>
+		<MkSwitch :modelValue="options.show" @update:modelValue="v => { update({ show: v }); }">
+			<template #label>show</template>
+		</MkSwitch>
+	</div>
+</div>
+</template>
+
+<script lang="ts" setup>
+import { computed, defineAsyncComponent, nextTick, onMounted, onUnmounted, ref, shallowRef, useTemplateRef, watch } from 'vue';
+import type { ObjectDef } from '@/world/room/object.js';
+import type { SimpleHeyaOptions } from '@/world/room/heya.js';
+import { i18n } from '@/i18n.js';
+import MkButton from '@/components/MkButton.vue';
+import MkSelect from '@/components/MkSelect.vue';
+import * as os from '@/os.js';
+import MkInput from '@/components/MkInput.vue';
+import MkSwitch from '@/components/MkSwitch.vue';
+import MkRange from '@/components/MkRange.vue';
+import { getHex, getRgb } from '@/world/utility.js';
+
+const props = defineProps<{
+	options: SimpleHeyaOptions['pillars']['nw' | 'ne' | 'sw' | 'se'];
+}>();
+
+const emit = defineEmits<{
+	(ev: 'update', v: SimpleHeyaOptions['pillars']['nw' | 'ne' | 'sw' | 'se']): void;
+}>();
+
+function update(v: Partial<SimpleHeyaOptions['pillars']['nw' | 'ne' | 'sw' | 'se']>) {
+	emit('update', { ...props.options, ...v });
+}
+</script>
+
+<style lang="scss" module>
+.root {
+}
+</style>
diff --git a/packages/frontend/src/pages/room.vue b/packages/frontend/src/pages/room.vue
index f4f4e313eb..b781384ec1 100644
--- a/packages/frontend/src/pages/room.vue
+++ b/packages/frontend/src/pages/room.vue
@@ -207,6 +207,28 @@ const data = localStorage.getItem('roomData') != null ? JSON.parse(localStorage.
 					withHabaki: false,
 				},
 			},
+			pillars: {
+				nw: {
+					material: null,
+					color: [0.9, 0.9, 0.9],
+					show: false,
+				},
+				ne: {
+					material: null,
+					color: [0.9, 0.9, 0.9],
+					show: false,
+				},
+				sw: {
+					material: null,
+					color: [0.9, 0.9, 0.9],
+					show: false,
+				},
+				se: {
+					material: null,
+					color: [0.9, 0.9, 0.9],
+					show: false,
+				},
+			},
 			flooring: {
 				material: 'wood',
 				color: [0.9, 0.9, 0.9],
@@ -257,6 +279,30 @@ if (data.heya.options.walls == null) {
 		},
 	};
 }
+if (data.heya.options.pillars == null) {
+	data.heya.options.pillars = {
+		nw: {
+			material: null,
+			color: [0.9, 0.9, 0.9],
+			show: false,
+		},
+		ne: {
+			material: null,
+			color: [0.9, 0.9, 0.9],
+			show: false,
+		},
+		sw: {
+			material: null,
+			color: [0.9, 0.9, 0.9],
+			show: false,
+		},
+		se: {
+			material: null,
+			color: [0.9, 0.9, 0.9],
+			show: false,
+		},
+	};
+}
 
 let latestData = deepClone(data);
 
diff --git a/packages/frontend/src/world/room/heya.ts b/packages/frontend/src/world/room/heya.ts
index ad08cdbfb9..a77cddd1a5 100644
--- a/packages/frontend/src/world/room/heya.ts
+++ b/packages/frontend/src/world/room/heya.ts
@@ -1,3 +1,4 @@
+/* eslint-disable id-denylist */
 /*
  * SPDX-FileCopyrightText: syuilo and misskey-project
  * SPDX-License-Identifier: AGPL-3.0-only
@@ -26,24 +27,22 @@ export abstract class HeyaManager<T = any> {
 	abstract dispose(): void;
 }
 
-type SimpleHeyaWallBase = {
-	material: null | 'wood' | 'concrete';
-	color: [number, number, number];
-	withHari: boolean;
-	hariMaterial: null | 'wood' | 'concrete';
-	hariColor: [number, number, number];
-	withHabaki: boolean;
-};
-
 export type SimpleHeyaOptions = {
 	dimension: [number, number];
 	window: 'none' | 'kosidakamado' | 'demado' | 'hakidasimado';
-	walls: {
-		n: SimpleHeyaWallBase;
-		s: SimpleHeyaWallBase;
-		w: SimpleHeyaWallBase;
-		e: SimpleHeyaWallBase;
-	};
+	walls: Record<'n' | 's' | 'w' | 'e', {
+		material: null | 'wood' | 'concrete';
+		color: [number, number, number];
+		withHari: boolean;
+		hariMaterial: null | 'wood' | 'concrete';
+		hariColor: [number, number, number];
+		withHabaki: boolean;
+	}>;
+	pillars: Record<'nw' | 'ne' | 'sw' | 'se', {
+		material: null | 'wood' | 'concrete';
+		color: [number, number, number];
+		show: boolean;
+	}>;
 	flooring: {
 		material: null | 'wood' | 'concrete';
 		color: [number, number, number];
@@ -58,27 +57,16 @@ export type JapaneseHeyaOptions = {
 	window: 'none' | 'kosidakamado' | 'demado' | 'hakidasimado';
 };
 
+// TODO: マテリアルは必要になるまで作成しないようにする
+
 export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 	private loaderResult: BABYLON.ISceneLoaderAsyncResult | null = null;
 	private meshes: BABYLON.Mesh[] = [];
-	private wallRoots: {
-		n: BABYLON.TransformNode;
-		s: BABYLON.TransformNode;
-		w: BABYLON.TransformNode;
-		e: BABYLON.TransformNode;
-	} | null = null;
-	private wallMaterials: {
-		n: BABYLON.PBRMaterial;
-		s: BABYLON.PBRMaterial;
-		w: BABYLON.PBRMaterial;
-		e: BABYLON.PBRMaterial;
-	} | null = null;
-	private wallHariMaterials: {
-		n: BABYLON.PBRMaterial;
-		s: BABYLON.PBRMaterial;
-		w: BABYLON.PBRMaterial;
-		e: BABYLON.PBRMaterial;
-	} | null = null;
+	private wallRoots: Record<'n' | 's' | 'w' | 'e', BABYLON.TransformNode> = null as any;
+	private wallMaterials: Record<'n' | 's' | 'w' | 'e', BABYLON.PBRMaterial> | null = null;
+	private wallHariMaterials: Record<'n' | 's' | 'w' | 'e', BABYLON.PBRMaterial> | null = null;
+	private pillarRoots: Record<'nw' | 'ne' | 'sw' | 'se', BABYLON.TransformNode> | null = null;
+	private pillarMaterials: Record<'nw' | 'ne' | 'sw' | 'se', BABYLON.PBRMaterial> | null = null;
 	private ceilingMaterial: BABYLON.PBRMaterial | null = null;
 	private floorMaterial: BABYLON.PBRMaterial | null = null;
 
@@ -121,6 +109,13 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 			e: this.loaderResult.transformNodes.find(t => t.name.includes('__WALL_E__'))!,
 		};
 
+		this.pillarRoots = {
+			nw: this.loaderResult.transformNodes.find(t => t.name.includes('__PILLAR_NW__'))!,
+			ne: this.loaderResult.transformNodes.find(t => t.name.includes('__PILLAR_NE__'))!,
+			sw: this.loaderResult.transformNodes.find(t => t.name.includes('__PILLAR_SW__'))!,
+			se: this.loaderResult.transformNodes.find(t => t.name.includes('__PILLAR_SE__'))!,
+		};
+
 		const wallMaterial = findMaterial(this.meshes[0], '__X_WALL__');
 		this.wallMaterials = {
 			n: wallMaterial.clone('wallNMaterial'),
@@ -137,6 +132,14 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 			e: hariMaterial.clone('wallEHariMaterial'),
 		};
 
+		const pillarMaterial = findMaterial(this.meshes[0], '__X_PILLAR__');
+		this.pillarMaterials = {
+			nw: pillarMaterial.clone('pillarNWMaterial'),
+			ne: pillarMaterial.clone('pillarNEMaterial'),
+			sw: pillarMaterial.clone('pillarSWMaterial'),
+			se: pillarMaterial.clone('pillarSEMaterial'),
+		};
+
 		for (const [k, v] of Object.entries(this.wallRoots)) {
 			for (const m of v.getChildMeshes().filter(m => m.material === wallMaterial)) {
 				m.material = this.wallMaterials[k];
@@ -145,6 +148,11 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 				m.material = this.wallHariMaterials[k];
 			}
 		}
+		for (const [k, v] of Object.entries(this.pillarRoots)) {
+			for (const m of v.getChildMeshes().filter(m => m.material === pillarMaterial)) {
+				m.material = this.pillarMaterials[k];
+			}
+		}
 
 		this.ceilingMaterial = findMaterial(this.meshes[0], '__X_CEILING__');
 		this.floorMaterial = findMaterial(this.meshes[0], '__X_FLOOR__');
@@ -161,9 +169,9 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 
 			for (const mesh of wallRoot.getChildMeshes()) {
 				if (mesh.name.includes('__X_HARI__')) {
-					mesh.isVisible = wallOptions.withHari;
+					mesh.setEnabled(wallOptions.withHari);
 				} else if (mesh.name.includes('__X_HABAKI__')) {
-					mesh.isVisible = wallOptions.withHabaki;
+					mesh.setEnabled(wallOptions.withHabaki);
 				}
 			}
 
@@ -208,6 +216,31 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 			}
 		}
 
+		for (const type of ['nw', 'ne', 'sw', 'se'] as const) {
+			const pillarRoot = this.pillarRoots[type];
+			const pillarOptions = options.pillars[type];
+
+			pillarRoot.setEnabled(pillarOptions.show);
+
+			const targetMaterial = this.pillarMaterials[type];
+
+			targetMaterial.unfreeze();
+			targetMaterial.albedoColor = new BABYLON.Color3(...pillarOptions.color);
+
+			const texPath = pillarOptions.material === 'wood' ? '/client-assets/room/textures/wall-wood2.png'
+				: pillarOptions.material === 'concrete' ? '/client-assets/room/textures/wall-concrete.png'
+				: null;
+
+			if (texPath != null) {
+				const tex = new BABYLON.Texture(texPath, this.meshes[0].getScene(), false, false);
+				targetMaterial.albedoTexture = tex;
+			} else {
+				targetMaterial.albedoTexture = null;
+			}
+
+			targetMaterial.freeze();
+		}
+
 		{
 			this.ceilingMaterial.unfreeze();
 			this.ceilingMaterial.albedoColor = new BABYLON.Color3(...options.ceiling.color);
@@ -250,14 +283,14 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 	public dispose() {
 		if (this.loaderResult != null) {
 			for (const m of this.loaderResult.meshes) {
-				m.dispose();
+				m.dispose(false, true);
 			}
 			for (const t of this.loaderResult.transformNodes) {
-				t.dispose();
+				t.dispose(false, true);
 			}
 		}
 		for (const m of this.meshes) {
-			m.dispose();
+			m.dispose(false, true);
 		}
 		for (const m of Object.values(this.wallMaterials ?? {})) {
 			m.dispose();
@@ -265,5 +298,8 @@ export class SimpleHeyaManager extends HeyaManager<SimpleHeyaOptions> {
 		for (const m of Object.values(this.wallHariMaterials ?? {})) {
 			m.dispose();
 		}
+		for (const m of Object.values(this.pillarMaterials ?? {})) {
+			m.dispose();
+		}
 	}
 }