diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
index 2112b1c..01f8cb2 100644
--- a/src/main/java/cactusServer/entities/Character.java
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -141,17 +141,17 @@
 		return "";
 	}
 
-	public void update(Position3D position, Quaternion3D angle, String modelID, String areaURI) {
+	public void update(Position3D position, Quaternion3D angle, int modelID) {
 		setPosition(position);
 		setAngle(angle);
-		if (modelID != null) {
-			setModelID(Integer.parseInt(modelID));
-		}
-		if (areaURI != null) {
-			setAreaURI(areaURI);
-		} else {
-			updateAreaURI();
-		}
+		setModelID(modelID);
+		updateAreaURI();
+	}
+
+	public void update(Position3D position, Quaternion3D angle, String areaURI) {
+		setPosition(position);
+		setAngle(angle);
+		setAreaURI(areaURI);
 	}
 
 	private void updateAreaURI() {
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index 7e6ea0e..0b6d6b4 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -3,6 +3,8 @@
 import java.util.HashMap;
 import java.util.HashSet;
 
+import javax.json.bind.annotation.JsonbTransient;
+
 import org.ntlab.radishforandroidstudio.framework.model3D.Object3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
@@ -47,7 +49,7 @@
 		setName(name);
 		setState(Instance.State.AVAILABLE);
 		setStageID(stageID);
-		// initUniverse();
+		initUniverse();
 	}
 
 	private void initUniverse() {
@@ -98,7 +100,6 @@
 		return characterMap;
 	}
 	
-	@JSONHint(ignore = true)
 	public HashMap<String, Character> getCharacters(String accountURI) {
 		if (accountURI == null || accountURI.isEmpty()) {
 			return getCharacters();
@@ -167,9 +168,9 @@
 		return this;
 	}
 
-	public Character updateCharacter(String characterId, Position3D position, Quaternion3D angle, String modelID) {
+	public Character updateCharacter(String characterId, Position3D position, Quaternion3D angle, int modelID) {
 		Character character = characterMap.get(characterId);
-		character.update(position, angle, modelID, null); // areaURI(��4����)�̍X�V�͌Ăяo����Ŏ����ōs����
+		character.update(position, angle, modelID);
 		return character;
 	}
 
diff --git a/src/main/java/cactusServer/entities/Player.java b/src/main/java/cactusServer/entities/Player.java
index 8ca34d1..3ec5e45 100644
--- a/src/main/java/cactusServer/entities/Player.java
+++ b/src/main/java/cactusServer/entities/Player.java
@@ -176,6 +176,6 @@
 
 	private void writeCharacterData(String characterURI) {
 		Character character = getCharacter(characterURI);
-		character.update(position, angle, null, areaURI); // model(��3����)�̍X�V�͏o���Ȃ�
+		character.update(position, angle, areaURI);
 	}
 }
diff --git a/src/main/java/cactusServer/utils/JSONProvider.java b/src/main/java/cactusServer/utils/JSONProvider.java
index 4cab69f..307f805 100644
--- a/src/main/java/cactusServer/utils/JSONProvider.java
+++ b/src/main/java/cactusServer/utils/JSONProvider.java
@@ -5,6 +5,7 @@
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Type;
 
+import javax.inject.Singleton;
 import javax.ws.rs.Produces;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.MediaType;
@@ -14,8 +15,9 @@
 
 import net.arnx.jsonic.JSON;
 
-@Provider()
+@Provider
 @Produces(MediaType.APPLICATION_JSON)
+@Singleton
 public class JSONProvider implements MessageBodyWriter<Object> {
 	@Override
 	public long getSize(Object obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
@@ -28,14 +30,15 @@
 
 	@Override
 	public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
-		// return true;
-		return mediaType.isCompatible(MediaType.APPLICATION_JSON_TYPE);
+		return true;
 	}
 
 	@Override
 	public void writeTo(Object obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType,
 			MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
 			throws IOException, WebApplicationException {
+		System.out.println("JSONProvider#writeTo()���J�n");
 		JSON.encode(obj, entityStream);
+		System.out.println("JSONProvider#writeTo()���I��");
 	}
 }
\ No newline at end of file