diff --git a/src/main/java/cactusServer/entities/AddressedEntity.java b/src/main/java/cactusServer/entities/AddressedEntity.java
index 52c55fc..d66bee5 100644
--- a/src/main/java/cactusServer/entities/AddressedEntity.java
+++ b/src/main/java/cactusServer/entities/AddressedEntity.java
@@ -13,7 +13,7 @@
 	}
 
 	public AddressedEntity(Entity body) {
-		this.body = body;
+		setBody(body);
 	}
 
 	public Entity getBody() {
diff --git a/src/main/java/cactusServer/entities/Angle.java b/src/main/java/cactusServer/entities/Angle.java
index 8976c0d..3edb57f 100644
--- a/src/main/java/cactusServer/entities/Angle.java
+++ b/src/main/java/cactusServer/entities/Angle.java
@@ -11,10 +11,10 @@
 	}
 	
 	public Angle(double vx, double vy, double vz, double a) {
-		this.vx = vx;
-		this.vy = vy;
-		this.vz = vz;
-		this.a = a;
+		setVx(vx);
+		setVy(vy);
+		setVz(vz);
+		setA(a);
 	}
 	
 	public double getVx() {
diff --git a/src/main/java/cactusServer/entities/Area.java b/src/main/java/cactusServer/entities/Area.java
index ce7b7e8..3dc0ee4 100644
--- a/src/main/java/cactusServer/entities/Area.java
+++ b/src/main/java/cactusServer/entities/Area.java
@@ -12,28 +12,44 @@
 	}
 	
 	public Area(String name, Plain[] region, HashSet<Allowed> permissions) {
-		this.name = name;
-		this.region = region;
-		this.permissions = permissions;
+		setName(name);
+		setRegion(region);
+		setPermissions(permissions);
 	}
 	
 	public String getName() {
 		return name;
 	}
 	
-	public Plain[] getRegions() {
+	public Plain[] getRegion() {
 		return region;
 	}
-	
+
 	public Plain getRegion(int index) {
 		return region[index];
 	}
 	
+	public HashSet<Allowed> getPermissions() {
+		return permissions;
+	}
+	
 	public boolean isPermission(Allowed allowed) {
 		return permissions.contains(allowed);
 	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
 	
-	public void setPermission(Allowed allowed) {
+	public void setRegion(Plain[] region) {
+		this.region = region;
+	}
+	
+	public void setPermissions(HashSet<Allowed> permissions) {
+		this.permissions = permissions;
+	}
+	
+	public void addPermission(Allowed allowed) {
 		permissions.add(allowed);
 	}
 	
diff --git a/src/main/java/cactusServer/entities/CameraState.java b/src/main/java/cactusServer/entities/CameraState.java
index 0750a0f..e4704db 100644
--- a/src/main/java/cactusServer/entities/CameraState.java
+++ b/src/main/java/cactusServer/entities/CameraState.java
@@ -11,10 +11,10 @@
 	}
 	
 	public CameraState(double distance, Angle angle, double tilt, double fov) {
-		this.distance = distance;
-		this.angle = angle;
-		this.tilt = tilt;
-		this.fov = fov;
+		setDistance(distance);
+		setAngle(angle);
+		setTilt(tilt);
+		setFov(fov);
 	}
 
 	public double getDistance() {
diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
index 36084d1..f435a04 100644
--- a/src/main/java/cactusServer/entities/Character.java
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -26,11 +26,11 @@
 	}
 	
 	public Character(String accountURI, String name, Position3D position, Angle angle, CharacterModel model) {
-		this.accountURI = accountURI;
-		this.name = name;
-		this.position = position;
-		this.angle = angle;
-		this.model = model;
+		setAccountURI(accountURI);
+		setName(name);
+		setPosition(position);
+		setAngle(angle);
+		setModel(model);
 		updateAreaURI();
 	}
 
@@ -70,6 +70,10 @@
 		return itemList;
 	}
 
+	public void setAccountURI(String accountURI) {
+		this.accountURI = accountURI;
+	}
+	
 	public void setName(String name) {
 		this.name = name;
 	}
@@ -118,7 +122,7 @@
 	}
 	
 	private void updateAreaURI() {
-		
+		// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
 	}
 	
 	public Item destroyItem(String itemId) {
diff --git a/src/main/java/cactusServer/entities/EmoteState.java b/src/main/java/cactusServer/entities/EmoteState.java
index 21a3750..ab16a90 100644
--- a/src/main/java/cactusServer/entities/EmoteState.java
+++ b/src/main/java/cactusServer/entities/EmoteState.java
@@ -14,7 +14,7 @@
 	}
 	
 	public EmoteState(EmoteType emoteType) {
-		this.emoteType = emoteType;
+		setEmoteType(emoteType);
 	}
 	
 	public EmoteType getEmoteType() {
@@ -22,10 +22,7 @@
 	}
 
 	public void setEmoteType(EmoteType emoteType) {
-		if (!this.emoteType.equals(emoteType)) {
-			this.emoteType = emoteType;
-			// ���̉��ŃG���[�g�̎�ނ�ύX�������Ƃɂ��K�v�������Ăяo��
-		}
+		this.emoteType = emoteType;
 	}
 	
 	public static enum EmoteType {
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index 9e79a1b..7a5ff6c 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -29,7 +29,7 @@
 	private String name;
 	private State state;
 	private StageModel stage;
-	
+
 	private HashMap<String, Area> areaMap = new HashMap<>();
 	private HashMap<String, Object> objMap = new HashMap<>();
 	private HashMap<String, Character> characterMap = new HashMap<>();
@@ -44,9 +44,9 @@
 	 * @param name �C���X�^���X��
 	 */
 	public Instance(String name, State state, StageModel stageModel) {
-		this.name = name;
-		this.state = state;
-		this.stage = stageModel;
+		setName(name);
+		setState(state);
+		setStage(stageModel);
 	}
 	
 	/**
@@ -134,6 +134,10 @@
 	public void setState(State state) {
 		this.state = state;
 	}
+	
+	public void setStage(StageModel stage) {
+		this.stage = stage;
+	}
 
 	public AddressedEntity createArea(String name, Plain[] region, HashSet<Allowed> permissions) {
 		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, areaMap.keySet());
diff --git a/src/main/java/cactusServer/entities/Item.java b/src/main/java/cactusServer/entities/Item.java
index 5655ddd..88533bb 100644
--- a/src/main/java/cactusServer/entities/Item.java
+++ b/src/main/java/cactusServer/entities/Item.java
@@ -9,8 +9,8 @@
 	}
 	
 	public Item(String name, int amount) {
-		this.name = name;
-		this.amount = amount;
+		setName(name);
+		setAmount(amount);
 	}
 
 	public String getName() {
@@ -25,6 +25,14 @@
 		return (amount == 0);
 	}
 	
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public void setAmount(int amount) {
+		this.amount = amount;
+	}
+	
 	public Item changeAmount(int amountOfChange) {
 		amount = Math.max(amount + amountOfChange, 0);
 		return this;
diff --git a/src/main/java/cactusServer/entities/Object.java b/src/main/java/cactusServer/entities/Object.java
index e91d73a..19f55f1 100644
--- a/src/main/java/cactusServer/entities/Object.java
+++ b/src/main/java/cactusServer/entities/Object.java
@@ -22,9 +22,9 @@
 		setPosition(position);
 		setVelocity(velocity);
 		setAngularVelocity(angularVelocity);
-		this.angle = angle;
-		this.attribute = attribute;
-		this.model = model;
+		setAngle(angle);
+		setAttribute(attribute);
+		setModel(model);
 	}
 	
 	public Position3D getPosition() {
@@ -76,12 +76,12 @@
 	}
 	
 	public static class Attribute {
-		private boolean moveable;
-		private double cof;
+		private boolean moveable; // �“�
+		private double cof; // ���C�W��
 		
 		public Attribute(boolean moveable, double cof) {
-			this.moveable = moveable;
-			this.cof = cof;
+			setMoveable(moveable);
+			setCof(cof);
 		}
 		
 		public boolean isMoveable() {
@@ -91,5 +91,13 @@
 		public double getCof() {
 			return cof;
 		}
+		
+		public void setMoveable(boolean moveable) {
+			this.moveable = moveable;
+		}
+
+		public void setCof(double cof) {
+			this.cof = cof;
+		}
 	}
 }
diff --git a/src/main/java/cactusServer/entities/Plain.java b/src/main/java/cactusServer/entities/Plain.java
index de5f57d..fbe7603 100644
--- a/src/main/java/cactusServer/entities/Plain.java
+++ b/src/main/java/cactusServer/entities/Plain.java
@@ -13,10 +13,10 @@
 	}
 	
 	public Plain(double a, double b, double c, double d) {
-		this.a = a;
-		this.b = b;
-		this.c = c;
-		this.d = d;
+		setA(a);
+		setB(b);
+		setC(c);
+		setD(d);
 	}
 	
 	public double getA() {
@@ -34,4 +34,20 @@
 	public double getD() {
 		return d;
 	}
+	
+	public void setA(double a) {
+		this.a = a;
+	}
+
+	public void setB(double b) {
+		this.b = b;
+	}
+
+	public void setC(double c) {
+		this.c = c;
+	}
+
+	public void setD(double d) {
+		this.d = d;
+	}
 }
diff --git a/src/main/java/cactusServer/entities/Player.java b/src/main/java/cactusServer/entities/Player.java
index 48af2e2..f2c59d4 100644
--- a/src/main/java/cactusServer/entities/Player.java
+++ b/src/main/java/cactusServer/entities/Player.java
@@ -17,12 +17,12 @@
 	}
 	
 	public Player(String instanceURI, String characterURI, CameraState cameraState, EmoteState.EmoteType animationClassToStart) {
-		this.instanceURI = instanceURI;
-		this.characterURI = characterURI;
-		this.cameraState = cameraState;
-		this.emoteState = new EmoteState(animationClassToStart);
+		setInstanceURI(instanceURI);
+		setCharacterURI(characterURI);
+		setCameraState(cameraState);
+		setEmoteState(new EmoteState(animationClassToStart));
 	}
-	
+
 	public String getInstanceURI() {
 		return instanceURI;
 	}
@@ -71,6 +71,14 @@
 		this.cameraState = cameraState;
 	}
 	
+	public void setEmoteState(EmoteState emoteState) {
+		this.emoteState = emoteState;
+	}
+	
+	public void setanimationClassToStart(EmoteState.EmoteType animationClassToStart) {
+		setEmoteState(new EmoteState(animationClassToStart));
+	}
+	
 	public void updateEmoteType(EmoteState.EmoteType animationClassToStart) {
 		this.emoteState.setEmoteType(animationClassToStart);
 	}