diff --git a/src/main/java/cactusServer/entities/Area.java b/src/main/java/cactusServer/entities/Area.java
index 3dc0ee4..20496b4 100644
--- a/src/main/java/cactusServer/entities/Area.java
+++ b/src/main/java/cactusServer/entities/Area.java
@@ -2,25 +2,30 @@
 
 import java.util.HashSet;
 
-public class Area extends Entity{
+import framework.model3D.Position3D;
+import net.arnx.jsonic.JSONHint;
+
+public class Area extends Entity {
 	private String name;
 	private Plain[] region; // �C�ӌ‚̕��ʂ̕�����
 	private HashSet<Allowed> permissions; // �G���A���ʼn”\�Ȃ��Ƃ̗���
+	@JSONHint(ignore = true)
+	public static final int UNIQUE_ID_LENGTH = 12;
 
 	private Area() {
 		// JSONDecode���̌Ăяo���p
 	}
-	
+
 	public Area(String name, Plain[] region, HashSet<Allowed> permissions) {
 		setName(name);
 		setRegion(region);
 		setPermissions(permissions);
 	}
-	
+
 	public String getName() {
 		return name;
 	}
-	
+
 	public Plain[] getRegion() {
 		return region;
 	}
@@ -28,35 +33,47 @@
 	public Plain getRegion(int index) {
 		return region[index];
 	}
-	
+
 	public HashSet<Allowed> getPermissions() {
 		return permissions;
 	}
-	
+
 	public boolean isPermission(Allowed allowed) {
 		return permissions.contains(allowed);
 	}
 
+	public boolean isSurroundingPosition(Position3D position) {
+		for (Plain plain : region) {
+			// ������ Plain��a,b,c,d �� Character��x,y,z ��p����, �L�����N�^�[�����ʂ̗��ɂ��邩�ǂ����̔�����s��
+			double equation = (plain.getA() * position.getX()) + (plain.getB() * position.getY())
+					+ (plain.getC() * position.getZ()) + plain.getD();
+			if (equation > 0) {
+				return false;
+			}
+		}
+		return true;
+	}
+
 	public void setName(String name) {
 		this.name = name;
 	}
-	
+
 	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);
 	}
-	
+
 	public void removePermission(Allowed allowed) {
 		permissions.remove(allowed);
 	}
-	
+
 	public static enum Allowed {
 		SHOOT, KILL;
 	}
diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
index f435a04..08c2516 100644
--- a/src/main/java/cactusServer/entities/Character.java
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -1,43 +1,54 @@
 package cactusServer.entities;
 
-import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import cactusServer.models.Instances;
 import cactusServer.utils.RandomStringGenerator;
 import framework.model3D.Position3D;
 import net.arnx.jsonic.JSONHint;
 
-public class Character extends Entity{
+public class Character extends Entity {
 	private String accountURI;
 	private String name;
 	private Position3D position;
 	private Angle angle;
-	private CharacterModel model;
+	private String model;
 	private String areaURI;
-
 	private HashMap<String, Item> itemMap = new HashMap<>();
-	private static final int UNIQUE_ID_LENGTH = 12;
+	@JSONHint(ignore = true)
+	public static final int UNIQUE_ID_LENGTH = 12;
 
 	private Character() {
 		// JSONDecode���̌Ăяo���p
 	}
-	
-	public Character(String accountURI, String name, Position3D position, Angle angle, CharacterModel model) {
+
+	// public Character(String accountURI, String name, Position3D position, Angle
+	// angle, String model) {
+	// setAccountURI(accountURI);
+	// setName(name);
+	// setPosition(position);
+	// setAngle(angle);
+	// setModel(model);
+	// updateAreaURI();
+	// }
+
+	public Character(String instanceId, String accountURI, String name, Position3D position, Angle angle,
+			String model) {
 		setAccountURI(accountURI);
 		setName(name);
 		setPosition(position);
 		setAngle(angle);
 		setModel(model);
-		updateAreaURI();
+		initAreaURI(instanceId);
 	}
 
 	public String getAccountURI() {
 		return accountURI;
 	}
-	
+
 	public String getName() {
 		return name;
 	}
@@ -45,23 +56,25 @@
 	public Position3D getPosition() {
 		return position;
 	}
-	
+
 	public Angle getAngle() {
 		return angle;
 	}
 
-	public CharacterModel getModel() {
+	public String getModel() {
 		return model;
 	}
-	
+
 	public String getAreaURI() {
 		return areaURI;
 	}
-	
+
+	@JSONHint(ignore = true)
 	public Item getItem(String itemId) {
 		return itemMap.get(itemId);
 	}
-	
+
+	@JSONHint(ignore = true)
 	public List<Item> getItems() {
 		List<Item> itemList = new ArrayList<>();
 		for (Item item : itemMap.values()) {
@@ -73,7 +86,7 @@
 	public void setAccountURI(String accountURI) {
 		this.accountURI = accountURI;
 	}
-	
+
 	public void setName(String name) {
 		this.name = name;
 	}
@@ -81,15 +94,15 @@
 	public void setPosition(Position3D position) {
 		this.position = position;
 	}
-	
+
 	public void setAngle(Angle angle) {
 		this.angle = angle;
 	}
 
-	public void setModel(CharacterModel model) {
+	public void setModel(String model) {
 		this.model = model;
 	}
-	
+
 	public void setAreaURI(String areaURI) {
 		this.areaURI = areaURI;
 	}
@@ -97,13 +110,14 @@
 	public AddressedEntity createItem(String name, int amount) {
 		Item item = new Item(name, amount);
 		if (!hasItem(item)) {
-			String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, itemMap.keySet());
+			String id = RandomStringGenerator.generateUniqueString(Item.UNIQUE_ID_LENGTH,
+					RandomStringGenerator.ALPHA_NUMERIC, itemMap.keySet());
 			itemMap.put(id, item);
 			return new IDAddressedEntity(id, item);
 		}
 		return null;
 	}
-	
+
 	public boolean hasItem(Item item) {
 		for (Map.Entry<String, Item> entry : itemMap.entrySet()) {
 			if (entry.getValue().equals(item)) {
@@ -112,7 +126,7 @@
 		}
 		return false;
 	}
-	
+
 	public Item changeAmountOfItem(String itemId, int amountOfChange) {
 		Item item = itemMap.get(itemId).changeAmount(amountOfChange);
 		if (item.isEmpty()) {
@@ -120,11 +134,51 @@
 		}
 		return item;
 	}
-	
-	private void updateAreaURI() {
-		// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
+
+	private void initAreaURI(String instanceId) {
+		Instance instance = Instances.getInstance().getInstance(instanceId);
+		setAreaURI(findAreaURI(instance));
 	}
-	
+
+	private String findAreaURI(Instance instance) {
+		// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
+		for (String areaId : instance.getAreaIdSet()) {
+			Area area = instance.getArea(areaId);
+			if (area.isSurroundingPosition(position)) {
+				int subStringEndIndex = areaURI.length() - Area.UNIQUE_ID_LENGTH;
+				StringBuilder newAreaURI = new StringBuilder();
+				return newAreaURI.append(areaURI.substring(0, subStringEndIndex)).append(areaId).toString();
+			}
+		}
+		return "";
+	}
+
+	public void update(Position3D position, Angle angle, String model, String areaURI) {
+		setPosition(position);
+		setAngle(angle);
+		if (model != null) {
+			setModel(model);
+		}
+		if (areaURI != null) {
+			setAreaURI(areaURI);
+		} else {
+			updateAreaURI();
+		}
+	}
+
+	private void updateAreaURI() {
+		String[] areaURISplit = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
+		int splitSize = areaURISplit.length;
+		String instanceId = areaURISplit[splitSize - 3];
+		String previousAreaId = areaURISplit[splitSize - 1];
+		Instance instance = Instances.getInstance().getInstance(instanceId);
+		Area previousArea = instance.getArea(previousAreaId);
+		if (!previousArea.isSurroundingPosition(position)) {
+			// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
+			setAreaURI(findAreaURI(instance));
+		}
+	}
+
 	public Item destroyItem(String itemId) {
 		return itemMap.remove(itemId);
 	}
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index d324b19..e8860ad 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -1,18 +1,15 @@
 package cactusServer.entities;
 
-import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
-import java.util.Map;
 import java.util.Set;
 
 import cactusServer.entities.Entity;
 import cactusServer.entities.Object;
 import cactusServer.entities.Area.Allowed;
 import cactusServer.entities.Object.Attribute;
-import cactusServer.models.Instances;
 import cactusServer.utils.RandomStringGenerator;
 import cactusServer.entities.Character;
 import framework.model3D.Position3D;
@@ -22,26 +19,29 @@
 
 /**
  * �C���X�^���X
- * @author ryo isitani
+ * 
+ * @author r-isitani
  *
  */
 public class Instance extends Entity {
 	private String name;
 	private State state;
 	private String stage;
-
 	private HashMap<String, Area> areaMap = new HashMap<>();
 	private HashMap<String, Object> objMap = new HashMap<>();
 	private HashMap<String, Character> characterMap = new HashMap<>();
-	private static final int UNIQUE_ID_LENGTH = 12;
+	@JSONHint(ignore = true)
+	public static final int UNIQUE_ID_LENGTH = 12;
 
 	private Instance() {
 		// JSONDecode���̌Ăяo���p
 	}
-	
+
 	/**
 	 * (�����͌����_�ł̉��̂���)
-	 * @param name �C���X�^���X��
+	 * 
+	 * @param name
+	 *            �C���X�^���X��
 	 */
 	public Instance(String name, State state, String stageModel) {
 		setName(name);
@@ -52,11 +52,11 @@
 	public String getName() {
 		return name;
 	}
-	
+
 	public State getState() {
 		return state;
 	}
-	
+
 	public String getStage() {
 		return stage;
 	}
@@ -65,22 +65,22 @@
 	public Set<String> getAreaIdSet() {
 		return areaMap.keySet();
 	}
-	
+
 	@JSONHint(ignore = true)
 	public Area getArea(String areaId) {
 		return areaMap.get(areaId);
 	}
-	
+
 	@JSONHint(ignore = true)
 	public Set<String> getObjIdSet() {
 		return objMap.keySet();
 	}
-	
+
 	@JSONHint(ignore = true)
 	public Object getObject(String objId) {
 		return objMap.get(objId);
 	}
-	
+
 	@JSONHint(ignore = true)
 	public List<Character> getCharacters() {
 		return new ArrayList<Character>(characterMap.values());
@@ -90,60 +90,75 @@
 	public Character getCharacter(String characterId) {
 		return characterMap.get(characterId);
 	}
-	
+
 	public void setName(String name) {
 		this.name = name;
 	}
-	
+
 	public void setState(State state) {
 		this.state = state;
 	}
-	
+
 	public void setStage(String stage) {
 		this.stage = stage;
 	}
 
 	public IDAddressedEntity createArea(String name, Plain[] region, HashSet<Allowed> permissions) {
-		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, areaMap.keySet());
+		String id = RandomStringGenerator.generateUniqueString(Area.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, areaMap.keySet());
 		Area area = new Area(name, region, permissions);
 		areaMap.put(id, area);
 		return new IDAddressedEntity(id, area);
 	}
-	
-	public IDAddressedEntity createObject(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity, Angle angle, Attribute attribute, ObjectModel model) {
-		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, objMap.keySet());
+
+	public IDAddressedEntity createObject(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity,
+			Angle angle, Attribute attribute, String model) {
+		String id = RandomStringGenerator.generateUniqueString(Object.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, objMap.keySet());
 		Object object = new Object(position, velocity, angularVelocity, angle, attribute, model);
 		objMap.put(id, object);
 		return new IDAddressedEntity(id, object);
 	}
 	
-	public IDAddressedEntity createCharacter(String accountURI, String name, Position3D position, Angle angle, CharacterModel model) {
-		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, characterMap.keySet());
-		Character character = new Character(accountURI, name, position, angle, model);
+	/**
+	 * InstancesRest�Ƃ̃G���[�����p (��ŏ���)
+	 */
+	public IDAddressedEntity createObject(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity,
+			Angle angle, Attribute attribute, ObjectModel model) {
+		String id = RandomStringGenerator.generateUniqueString(Object.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, objMap.keySet());
+		Object object = new Object(position, velocity, angularVelocity, angle, attribute, "");
+		objMap.put(id, object);
+		return new IDAddressedEntity(id, object);
+	}
+
+	public IDAddressedEntity createCharacter(String instanceId, String accountURI, String name, Position3D position,
+			Angle angle, String model) {
+		String id = RandomStringGenerator.generateUniqueString(Character.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, characterMap.keySet());
+		Character character = new Character(instanceId, accountURI, name, position, angle, model);
 		characterMap.put(id, character);
 		return new IDAddressedEntity(id, character);
 	}
 
-	public Character updateCharacter(String characterId, Position3D position, Angle angle, CharacterModel model) {
+	public Character updateCharacter(String characterId, Position3D position, Angle angle, String model) {
 		Character character = characterMap.get(characterId);
-		character.setPosition(position);
-		character.setAngle(angle);
-		character.setModel(model);
+		character.update(position, angle, model, null); // areaURI(��4����)�̍X�V�͌Ăяo����Ŏ����ōs����
 		return character;
 	}
-	
+
 	public Character destroyCharacter(String characterId) {
 		return characterMap.remove(characterId);
 	}
-	
+
 	public Area destroyArea(String areaId) {
 		return areaMap.remove(areaId);
 	}
-	
+
 	public Object destroyObject(String objId) {
 		return objMap.remove(objId);
 	}
-	
+
 	public static enum State {
 		AVAILABLE, MAINTENANCE;
 	}
diff --git a/src/main/java/cactusServer/entities/Item.java b/src/main/java/cactusServer/entities/Item.java
index 88533bb..0055397 100644
--- a/src/main/java/cactusServer/entities/Item.java
+++ b/src/main/java/cactusServer/entities/Item.java
@@ -1,8 +1,11 @@
 package cactusServer.entities;
 
+import net.arnx.jsonic.JSONHint;
+
 public class Item extends Entity{
 	private String name;
 	private int amount;
+	@JSONHint(ignore = true) public static final int UNIQUE_ID_LENGTH = 12;
 	
 	private Item() {
 		// JSONDecode���̌Ăяo���p
diff --git a/src/main/java/cactusServer/entities/Object.java b/src/main/java/cactusServer/entities/Object.java
index 19f55f1..d73a8f9 100644
--- a/src/main/java/cactusServer/entities/Object.java
+++ b/src/main/java/cactusServer/entities/Object.java
@@ -1,24 +1,25 @@
 package cactusServer.entities;
 
-import java.util.HashMap;
-
 import framework.model3D.Position3D;
 import framework.physics.AngularVelocity3D;
 import framework.physics.Velocity3D;
+import net.arnx.jsonic.JSONHint;
 
-public class Object extends Entity{
+public class Object extends Entity {
 	private Position3D position;
 	private Velocity3D velocity;
 	private AngularVelocity3D angularVelocity;
 	private Angle angle;
 	private Attribute attribute;
-	private ObjectModel model;
+	private String model;
+	@JSONHint(ignore = true) public static final int UNIQUE_ID_LENGTH = 12;
 
 	private Object() {
 		// JSONDecode���̌Ăяo���p
 	}
-	
-	public Object(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity, Angle angle, Attribute attribute, ObjectModel model) {
+
+	public Object(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity, Angle angle,
+			Attribute attribute, String model) {
 		setPosition(position);
 		setVelocity(velocity);
 		setAngularVelocity(angularVelocity);
@@ -26,19 +27,19 @@
 		setAttribute(attribute);
 		setModel(model);
 	}
-	
+
 	public Position3D getPosition() {
 		return position;
 	}
-	
+
 	public Velocity3D getVelocity() {
 		return velocity;
 	}
-	
+
 	public AngularVelocity3D getAngularVelocity() {
 		return angularVelocity;
 	}
-	
+
 	public Angle getAngle() {
 		return angle;
 	}
@@ -47,22 +48,22 @@
 		return attribute;
 	}
 
-	public ObjectModel getModel() {
+	public String getModel() {
 		return model;
 	}
-	
+
 	public void setPosition(Position3D position) {
 		this.position = position;
 	}
-	
+
 	public void setVelocity(Velocity3D velocity) {
 		this.velocity = velocity;
 	}
-	
+
 	public void setAngularVelocity(AngularVelocity3D angularVelocity) {
 		this.angularVelocity = angularVelocity;
 	}
-	
+
 	public void setAngle(Angle angle) {
 		this.angle = angle;
 	}
@@ -71,27 +72,27 @@
 		this.attribute = attribute;
 	}
 
-	public void setModel(ObjectModel model) {
+	public void setModel(String model) {
 		this.model = model;
 	}
-	
+
 	public static class Attribute {
 		private boolean moveable; // �“�
 		private double cof; // ���C�W��
-		
+
 		public Attribute(boolean moveable, double cof) {
 			setMoveable(moveable);
 			setCof(cof);
 		}
-		
+
 		public boolean isMoveable() {
 			return moveable;
 		}
-		
+
 		public double getCof() {
 			return cof;
 		}
-		
+
 		public void setMoveable(boolean moveable) {
 			this.moveable = moveable;
 		}
diff --git a/src/main/java/cactusServer/entities/Plain.java b/src/main/java/cactusServer/entities/Plain.java
index fbe7603..cdbad6c 100644
--- a/src/main/java/cactusServer/entities/Plain.java
+++ b/src/main/java/cactusServer/entities/Plain.java
@@ -1,7 +1,5 @@
 package cactusServer.entities;
 
-import java.util.List;
-
 public class Plain {
 	private double a; // ���ʂ̕����� ax+by+cz+d ��a
 	private double b; // ���ʂ̕����� ax+by+cz+d ��b
@@ -11,30 +9,30 @@
 	private Plain() {
 		// JSONDecode���̌Ăяo���p
 	}
-	
+
 	public Plain(double a, double b, double c, double d) {
 		setA(a);
 		setB(b);
 		setC(c);
 		setD(d);
 	}
-	
+
 	public double getA() {
 		return a;
 	}
-	
+
 	public double getB() {
 		return b;
 	}
-	
+
 	public double getC() {
 		return c;
 	}
-	
+
 	public double getD() {
 		return d;
 	}
-	
+
 	public void setA(double a) {
 		this.a = a;
 	}
diff --git a/src/main/java/cactusServer/entities/Player.java b/src/main/java/cactusServer/entities/Player.java
index 0c59537..4d1ce8e 100644
--- a/src/main/java/cactusServer/entities/Player.java
+++ b/src/main/java/cactusServer/entities/Player.java
@@ -2,6 +2,7 @@
 
 import cactusServer.models.Instances;
 import framework.model3D.Position3D;
+import net.arnx.jsonic.JSONHint;
 
 public class Player extends Entity {
 	private String instanceURI;
@@ -11,6 +12,8 @@
 	private Angle angle;
 	private CameraState cameraState;
 	private EmoteState emoteState;
+	@JSONHint(ignore = true)
+	public static final int UNIQUE_ID_LENGTH = 12;
 
 	private Player() {
 		// JSONDecode���̌Ăяo���p
@@ -21,16 +24,20 @@
 		setInstanceURI(instanceURI);
 		setCharacterURI(characterURI);
 		setCameraState(cameraState);
-		setEmoteState(new EmoteState(animationClassToStart));
+		setAnimationClassToStart(animationClassToStart);
 		readCharacterData(characterURI);
 	}
 
-	private void readCharacterData(String characterURI) {
+	private Character getCharacter(String characterURI) {
 		String[] characterURISplit = characterURI.split("/"); // �c�c/instances/{instanceId}/characters/{characterId}
 		int splitSize = characterURISplit.length;
 		String characterId = characterURISplit[splitSize - 1];
 		String instanceId = characterURISplit[splitSize - 3];
-		Character character = Instances.getInstance().getInstance(instanceId).getCharacter(characterId);
+		return Instances.getInstance().getInstance(instanceId).getCharacter(characterId);
+	}
+
+	private void readCharacterData(String characterURI) {
+		Character character = getCharacter(characterURI);
 		setPosition(character.getPosition());
 		setAngle(character.getAngle());
 		setAreaURI(character.getAreaURI());
@@ -92,11 +99,57 @@
 		this.emoteState = emoteState;
 	}
 
-	public void setanimationClassToStart(EmoteState.EmoteType animationClassToStart) {
+	public void setAnimationClassToStart(EmoteState.EmoteType animationClassToStart) {
 		setEmoteState(new EmoteState(animationClassToStart));
 	}
 
-	public void updateEmoteType(EmoteState.EmoteType animationClassToStart) {
+	public Player update(String characterURI, Position3D position, Angle angle, CameraState cameraState,
+			EmoteState.EmoteType animationClassToStart) {
+		setCharacterURI(characterURI);
+		setPosition(position);
+		setAngle(angle);
+		setCameraState(cameraState);
+		updateEmoteType(animationClassToStart);
+		updateAreaURI();
+		return this;
+	}
+
+	private void updateAreaURI() {
+		String[] areaURISplit = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
+		int splitSize = areaURISplit.length;
+		String instanceId = areaURISplit[splitSize - 3];
+		String previousAreaId = areaURISplit[splitSize - 1];
+		Instance instance = Instances.getInstance().getInstance(instanceId);
+		Area previousArea = instance.getArea(previousAreaId);
+		if (!previousArea.isSurroundingPosition(position)) {
+			// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
+			setAreaURI(findAreaURI(instance));
+		}
+	}
+
+	private String findAreaURI(Instance instance) {
+		// �L�����N�^�[�̃|�W�V������p���Ăǂ̃G���A���ɂ��邩�𔻒肵�ē��Y�G���A��URI�ɍX�V����
+		for (String areaId : instance.getAreaIdSet()) {
+			Area area = instance.getArea(areaId);
+			if (area.isSurroundingPosition(position)) {
+				int subStringEndIndex = areaURI.length() - Area.UNIQUE_ID_LENGTH;
+				StringBuilder newAreaURI = new StringBuilder();
+				return newAreaURI.append(areaURI.substring(0, subStringEndIndex)).append(areaId).toString();
+			}
+		}
+		return "";
+	}
+
+	private void updateEmoteType(EmoteState.EmoteType animationClassToStart) {
 		this.emoteState.setEmoteType(animationClassToStart);
 	}
+
+	public void destroyPlayer() {
+		writeCharacterData(characterURI);
+	}
+
+	private void writeCharacterData(String characterURI) {
+		Character character = getCharacter(characterURI);
+		character.update(position, angle, null, areaURI); // model(��3����)�̍X�V�͏o���Ȃ�
+	}
 }
diff --git a/src/main/java/cactusServer/models/Instances.java b/src/main/java/cactusServer/models/Instances.java
index 45039ed..4d3bc6d 100644
--- a/src/main/java/cactusServer/models/Instances.java
+++ b/src/main/java/cactusServer/models/Instances.java
@@ -1,22 +1,17 @@
 package cactusServer.models;
 
-import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
-import org.apache.commons.lang3.RandomStringUtils;
-
-import cactusServer.entities.AddressedEntity;
+import cactusServer.entities.Angle;
 import cactusServer.entities.CameraState;
 import cactusServer.entities.EmoteState;
 import cactusServer.entities.IDAddressedEntity;
 import cactusServer.entities.Instance;
 import cactusServer.entities.Player;
-import cactusServer.entities.StageModel;
 import cactusServer.utils.RandomStringGenerator;
-import net.arnx.jsonic.JSONHint;
+import framework.model3D.Position3D;
 
 /**
  * �C���X�^���X���Ǘ�����N���X
@@ -28,8 +23,7 @@
 	private static Instances theInstance = null;
 	private HashMap<String, Instance> instanceMap = new HashMap<>(); // instance��ID�Ǝ��̂��Ǘ�
 	private HashMap<String, Player> playerMap = new HashMap<>();
-	private static final int UNIQUE_ID_LENGTH = 12;
-	
+
 	private Instances() {
 
 	}
@@ -45,23 +39,27 @@
 		}
 		return theInstance;
 	}
-	
+
 	/**
 	 * �V����Instance�N���X���쐬����Map�ɒlj�����
+	 * 
 	 * @param name
 	 * @param state
 	 * @param stageModel
 	 * @return
 	 */
 	public IDAddressedEntity createInstance(String name, Instance.State state, String stageModel) {
-		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, instanceMap.keySet());
+		String id = RandomStringGenerator.generateUniqueString(Instance.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, instanceMap.keySet());
 		Instance instance = new Instance(name, state, stageModel);
 		instanceMap.put(id, instance);
 		return new IDAddressedEntity(id, instance);
 	}
-	
-	public IDAddressedEntity createPlayer(String instanceURI, String characterURI, CameraState cameraState, EmoteState.EmoteType animationClassToStart) {
-		String id = RandomStringGenerator.generateUniqueString(UNIQUE_ID_LENGTH, RandomStringGenerator.ALPHA_NUMERIC, playerMap.keySet());
+
+	public IDAddressedEntity createPlayer(String instanceURI, String characterURI, CameraState cameraState,
+			EmoteState.EmoteType animationClassToStart) {
+		String id = RandomStringGenerator.generateUniqueString(Player.UNIQUE_ID_LENGTH,
+				RandomStringGenerator.ALPHA_NUMERIC, playerMap.keySet());
 		Player player = new Player(instanceURI, characterURI, cameraState, animationClassToStart);
 		playerMap.put(id, player);
 		return new IDAddressedEntity(id, player);
@@ -77,15 +75,22 @@
 	public Instance getInstance(String instanceId) {
 		return instanceMap.get(instanceId);
 	}
-	
+
 	public List<Player> getPlayers() {
 		return new ArrayList<Player>(playerMap.values());
 	}
-	
+
 	public Player getPlayer(String playerId) {
 		return playerMap.get(playerId);
 	}
 
+	public Player updatePlayer(String playerId, String characterURI, Position3D position, Angle angle,
+			CameraState cameraState, EmoteState.EmoteType animationClassToStart) {
+		Player player = playerMap.get(playerId);
+		player.update(characterURI, position, angle, cameraState, animationClassToStart);
+		return player;
+	}
+
 	/**
 	 * ID�ɑΉ�����Instance��Map����폜���ĕԂ�
 	 * 
@@ -96,7 +101,7 @@
 	public Instance destroyInstance(String instanceId) {
 		return instanceMap.remove(instanceId);
 	}
-	
+
 	public Player destroyPlayer(String playerId) {
 		return playerMap.remove(playerId);
 	}
diff --git a/src/main/java/cactusServer/utils/MyParamConverter.java b/src/main/java/cactusServer/utils/MyParamConverter.java
index 9f2cd8e..5c353cb 100644
--- a/src/main/java/cactusServer/utils/MyParamConverter.java
+++ b/src/main/java/cactusServer/utils/MyParamConverter.java
@@ -2,12 +2,11 @@
 
 import javax.ws.rs.ext.ParamConverter;
 
-import cactusServer.entities.StageModel;
 import net.arnx.jsonic.JSON;
 
 public class MyParamConverter implements ParamConverter<Object> {
 	private Class<?> type;
-	
+
 	public MyParamConverter(Class<?> type) {
 		this.type = type;
 	}
diff --git a/src/main/java/cactusServer/utils/MyParamConverterProvider.java b/src/main/java/cactusServer/utils/MyParamConverterProvider.java
index b29620d..61ed672 100644
--- a/src/main/java/cactusServer/utils/MyParamConverterProvider.java
+++ b/src/main/java/cactusServer/utils/MyParamConverterProvider.java
@@ -7,8 +7,12 @@
 import javax.ws.rs.ext.ParamConverterProvider;
 import javax.ws.rs.ext.Provider;
 
-import cactusServer.entities.StageModel;
-
+/**
+ * Rest�n�N���X�̃��\�b�h�ɂ�����,�@FormParam�A�m�e�[�V�������‚����������̌^��FormParam�̐��������<br>
+ * �������Ă��Ȃ��ꍇ��, ���Y�����𖞂������������S���N���X
+ * @author r-isitani
+ *
+ */
 @Provider
 public class MyParamConverterProvider implements ParamConverterProvider {
 	@Override