diff --git a/src/main/java/com/example/cosmos_serversb/entities/Group.java b/src/main/java/com/example/cosmos_serversb/entities/Group.java
index 8d0bdfb..0c7f4ab 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Group.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Group.java
@@ -4,7 +4,8 @@
 import java.util.ArrayList;
 
 public class Group {
-    private Long gId;
+    //private Long gId;
+    private String gId;
     private String uri, name;
     private ArrayList<User> members;
     private ArrayList<Request> requests;
@@ -14,16 +15,20 @@
     }
 
     public Group(String gId, String uri, String name, String uId){
-        this.gId = Long.parseLong(gId);
-        this.uri = uri;
-        this.name = name;
+        //this.gId = Long.parseLong(gId);
+        setgId(gId);
+        setUri(uri);
+        setName(name);
+        //this.gId = gId;
+        //this.uri = uri;
+        //this.name = name;
     }
 
-    public Long getgId() {
+    public String getgId() {
         return gId;
     }
 
-    private void setgId(Long gId) {
+    private void setgId(String gId) {
         this.gId = gId;
     }
 
diff --git a/src/main/java/com/example/cosmos_serversb/entities/Request.java b/src/main/java/com/example/cosmos_serversb/entities/Request.java
index 786f167..1f3ae15 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Request.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Request.java
@@ -2,7 +2,8 @@
 package com.example.cosmos_serversb.entities;
 
 public class Request {
-    private Long rId;
+    //private Long rId;
+    private String rId;
     private String uri, date, IssuerUid, product, deadline;
     private int location;// YahooローカルサーチAPIの業種コード
     private boolean done = false;
@@ -12,22 +13,22 @@
     }
 
     public Request(String rId, String uri, String date, String IssuerUid, String product, String deadline, int location){
-        //setrId(rId);
-        this.rId = Long.parseLong(rId);
+        //this.rId = Long.parseLong(rId);
+        setrId(rId);
         setUri(uri);
         setDate(date);
         setIssuerUid(IssuerUid);
         setProduct(product);
         setDeadline(deadline);
         setLocation(location);
-        //this.done = false;
+        this.done = false;
     }
 
-    public Long getrId() {
+    public String getrId() {
         return rId;
     }
 
-    private void setrId(Long gId) {
+    private void setrId(String rId) {
         this.rId = rId;
     }
 
diff --git a/src/test/java/hibernateTest/entities/Group.java b/src/test/java/hibernateTest/entities/Group.java
index e1c4111..6a46094 100644
--- a/src/test/java/hibernateTest/entities/Group.java
+++ b/src/test/java/hibernateTest/entities/Group.java
@@ -4,7 +4,8 @@
 import java.util.ArrayList;
 
 public class Group {
-    private Long gId;
+    //private Long gId;
+    private String gId;
     private String uri, name;
     //private ArrayList<User> members;
     private ArrayList<Request> requests;
@@ -14,16 +15,28 @@
     }
 
     public Group(String gId, String uri, String name, String uId){
-        this.gId = Long.parseLong(gId);
-        this.uri = uri;
-        this.name = name;
+        //this.gId = Long.parseLong(gId);
+        setgId(gId);
+        setUri(uri);
+        setName(name);
+        //this.gId = gId;
+        //this.uri = uri;
+        //this.name = name;
     }
 
-    public Long getgId() {
+//    public Long getgId() {
+//        return gId;
+//    }
+//
+//    private void setgId(Long gId) {
+//        this.gId = gId;
+//    }
+
+    public String getgId(){
         return gId;
     }
 
-    private void setgId(Long gId) {
+    private void setgId(String gId){
         this.gId = gId;
     }
 
diff --git a/src/test/java/hibernateTest/entities/Request.java b/src/test/java/hibernateTest/entities/Request.java
index 27b16a8..654e8a5 100644
--- a/src/test/java/hibernateTest/entities/Request.java
+++ b/src/test/java/hibernateTest/entities/Request.java
@@ -2,7 +2,8 @@
 package hibernateTest.entities;
 
 public class Request {
-    private Long rId;
+    private String rId;
+    //private Long rId;
     private String uri, date, IssuerUid, product, deadline;
     private int location;// YahooローカルサーチAPIの業種コード
     private boolean done = false;
@@ -12,8 +13,8 @@
     }
 
     public Request(String rId, String uri, String date, String IssuerUid, String product, String deadline, int location){
-        //setrId(rId);
-        this.rId = Long.parseLong(rId);
+        //this.rId = Long.parseLong(rId);
+        setrId(rId);
         setUri(uri);
         setDate(date);
         setIssuerUid(IssuerUid);
@@ -24,14 +25,23 @@
     }
 
 
-    private void setrId(Long rId){
+//    private void setrId(Long rId){
+//        this.rId = rId;
+//    }
+//
+//    public Long getrId(){
+//        return rId;
+//    }
+
+    private void setrId(String rId){
         this.rId = rId;
     }
 
-    public Long getrId(){
+    public String getrId(){
         return rId;
     }
 
+
     private void setUri(String uri){
         this.uri = uri;
     }
diff --git a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
index 1576d8e..478508b 100644
--- a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
+++ b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
@@ -91,7 +91,7 @@
 		session.beginTransaction();
 		//http://a4dosanddos.hatenablog.com/entry/2015/03/21/135421
 		//createCriteriaは非推奨。別の方法があるのか?
-		Criteria criteria = session.createCriteria(Request.class).add(Restrictions.eq("rId", (long)222));
+		Criteria criteria = session.createCriteria(Request.class).add(Restrictions.eq("rId", "222"));
 		Request editRequest = (Request) criteria.uniqueResult();
 		if(editRequest != null){
 			session.delete(editRequest);