diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
index b3f7ac6..ec3533c 100644
--- a/src/main/java/cactusServer/entities/Character.java
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -2,8 +2,11 @@
 
 import java.util.HashMap;
 
+import org.ntlab.radishforandroidstudio.framework.model3D.Object3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
+import org.ntlab.radishforandroidstudio.java3d.Box;
+import org.ntlab.radishforandroidstudio.java3d.Primitive;
 
 import cactusServer.models.Instances;
 import cactusServer.utils.RandomStringGenerator;
@@ -16,6 +19,8 @@
 	private Position3D position;
 	private Quaternion3D angle;
 	private int modelID;
+	private Primitive prim;
+	private Object3D object;
 
 	private HashMap<String, Item> itemMap = new HashMap<>();
 	@JSONHint(ignore = true)
@@ -33,6 +38,8 @@
 		setAngle(angle);
 		setModelID(modelID);
 		initAreaURI(instanceId);
+		setPrim(new Box());
+		setObject(new Object3D("",prim));
 	}
 
 	public String getAccountURI() {
@@ -170,4 +177,20 @@
 	public Item destroyItem(String itemId) {
 		return itemMap.remove(itemId);
 	}
+
+	public Primitive getPrim() {
+		return prim;
+	}
+
+	public void setPrim(Primitive prim) {
+		this.prim = prim;
+	}
+
+	public Object3D getObject() {
+		return object;
+	}
+
+	public void setObject(Object3D object) {
+		this.object = object;
+	}
 }
diff --git a/src/main/java/cactusServer/entities/Object.java b/src/main/java/cactusServer/entities/Object.java
index 722cd9f..1d27457 100644
--- a/src/main/java/cactusServer/entities/Object.java
+++ b/src/main/java/cactusServer/entities/Object.java
@@ -22,7 +22,8 @@
 	private Quaternion3D angle;
 	private Attribute attribute;
 	private Model3D model;
-	private Primitive prim = new Box();
+	private Primitive prim;
+	private Object3D object;
 
 	@JSONHint(ignore = true)
 	public static final int UNIQUE_ID_LENGTH = 12;
@@ -40,7 +41,8 @@
 		setAngle(angle);
 		setAttribute(attribute);
 		setModel(modelID);
-		Object3D object = new Object3D("",prim);
+		prim = new Box();
+		object = new Object3D("",prim);
 		setPlaceable(object);
 	}
 
@@ -122,4 +124,20 @@
 		}
 	}
 
+	public Primitive getPrim() {
+		return prim;
+	}
+
+	public void setPrim(Primitive prim) {
+		this.prim = prim;
+	}
+
+	public Object3D getObject() {
+		return object;
+	}
+
+	public void setObject(Object3D object) {
+		this.object = object;
+	}
+
 }
\ No newline at end of file
diff --git a/src/main/java/cactusServer/utils/App.java b/src/main/java/cactusServer/utils/App.java
index 0e7f785..f9d1b46 100644
--- a/src/main/java/cactusServer/utils/App.java
+++ b/src/main/java/cactusServer/utils/App.java
@@ -12,6 +12,7 @@
 import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
 import org.ntlab.radishforandroidstudio.framework.physics.AngularVelocity3D;
+import org.ntlab.radishforandroidstudio.framework.physics.PhysicsUtility;
 import org.ntlab.radishforandroidstudio.framework.physics.Velocity3D;
 
 import cactusServer.entities.*;
@@ -45,15 +46,16 @@
 
 	@Override
 	public void run() {
-		//System.out.println("�^�X�N�����s");
+		// System.out.println("�^�X�N�����s");
 		instancesSize = Instances.getInstance().getInstances().size();
-		for(int i=0;i<instancesSize;i++) {
+		for (int i = 0; i < instancesSize; i++) {
 			Instance instance = Instances.getInstance().getInstances().get(i);
 			int objectsSize = instance.getObjects().size();
-			int playersSize=instance.getCharacters().size();
-			for(int j=0;j<objectsSize;j++) {
-				for(int x=0;x<playersSize;x++) {
-					//PhysicsUtility.checkCollision(instance.)
+			int charactersSize = instance.getCharacters().size();
+			for (int j = 0; j < objectsSize; j++) {
+				for (int x = 0; x < charactersSize; x++) {
+					PhysicsUtility.checkCollision(instance.getCharacters().get(x).getObject(), "",
+							instance.getObjects().get(j).getObject(), "");
 				}
 			}
 		}
@@ -91,7 +93,7 @@
 		Instances.getInstance().getPlayers().put("player2", player2);
 		// �_�~�[�I�u�W�F�N�g
 		Instances.getInstance().getInstance("test1").createObject(new Position3D(0, 0, 0), new Velocity3D(),
-				new AngularVelocity3D(), new Quaternion3D(), new Attribute(true,1), 0);
+				new AngularVelocity3D(), new Quaternion3D(), new Attribute(true, 1), 0);
 		// �m�F�p
 		// String player1Encode = JSON.encode(player1, true);
 		// String player2Encode = JSON.encode(player2, true);