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..b1d1dcb 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 +4,7 @@
 import java.util.ArrayList;
 
 public class Group {
-    private Long gId;
+    private String gId;
     private String uri, name;
     private ArrayList<User> members;
     private ArrayList<Request> requests;
@@ -14,16 +14,16 @@
     }
 
     public Group(String gId, String uri, String name, String uId){
-        this.gId = Long.parseLong(gId);
-        this.uri = uri;
-        this.name = name;
+        setgId(gId);
+        setUri(uri);
+        setName(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..db9799c 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 +2,7 @@
 package com.example.cosmos_serversb.entities;
 
 public class Request {
-    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 +12,21 @@
     }
 
     public Request(String rId, String uri, String date, String IssuerUid, String product, String deadline, int location){
-        //setrId(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/main/resources/Group.hbm.xml b/src/main/resources/Group.hbm.xml
index 8e0333c..aac9a9b 100644
--- a/src/main/resources/Group.hbm.xml
+++ b/src/main/resources/Group.hbm.xml
@@ -14,7 +14,6 @@
 
     <class name="Group" table="GROUPS">
         <id name="gId" column="GID">
-            <generator class="increment"/>
         </id>
         <property name="uri" column="URI"/>
         <property name="name" column="NAME"/>
diff --git a/src/main/resources/Request.hbm.xml b/src/main/resources/Request.hbm.xml
index 4adea89..b08773b 100644
--- a/src/main/resources/Request.hbm.xml
+++ b/src/main/resources/Request.hbm.xml
@@ -14,7 +14,6 @@
 
     <class name="Request" table="REQUEST">
         <id name="rId" column="RID">
-            <generator class="increment"/>
         </id>
         <property name="uri" column="URI"/>
         <property name="date" column="DATE"/>
diff --git a/src/test/java/hibernateTest/entities/Event.java b/src/test/java/hibernateTest/entities/Event.java
index e2dd0cc..2a6df8a 100644
--- a/src/test/java/hibernateTest/entities/Event.java
+++ b/src/test/java/hibernateTest/entities/Event.java
@@ -26,7 +26,7 @@
 import java.util.Date;
 
 public class Event {
-	private Long id;//Longじゃないと,デフォルトでは動かなさそう。
+	private Long id;
 
 	private String title;
 	private Date date;
diff --git a/src/test/java/hibernateTest/entities/Group.java b/src/test/java/hibernateTest/entities/Group.java
index e1c4111..6eacf5b 100644
--- a/src/test/java/hibernateTest/entities/Group.java
+++ b/src/test/java/hibernateTest/entities/Group.java
@@ -4,7 +4,7 @@
 import java.util.ArrayList;
 
 public class Group {
-    private Long gId;
+    private String gId;
     private String uri, name;
     //private ArrayList<User> members;
     private ArrayList<Request> requests;
@@ -14,16 +14,16 @@
     }
 
     public Group(String gId, String uri, String name, String uId){
-        this.gId = Long.parseLong(gId);
-        this.uri = uri;
-        this.name = name;
+        setgId(gId);
+        setUri(uri);
+        setName(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/test/java/hibernateTest/entities/Request.java b/src/test/java/hibernateTest/entities/Request.java
index 27b16a8..1c84ea4 100644
--- a/src/test/java/hibernateTest/entities/Request.java
+++ b/src/test/java/hibernateTest/entities/Request.java
@@ -2,7 +2,7 @@
 package hibernateTest.entities;
 
 public class Request {
-    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;
@@ -12,8 +12,7 @@
     }
 
     public Request(String rId, String uri, String date, String IssuerUid, String product, String deadline, int location){
-        //setrId(rId);
-        this.rId = Long.parseLong(rId);
+        setrId(rId);
         setUri(uri);
         setDate(date);
         setIssuerUid(IssuerUid);
@@ -23,15 +22,15 @@
         this.done = false;
     }
 
-
-    private void setrId(Long 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 c9c97c3..e7ac3f7 100644
--- a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
+++ b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
@@ -26,9 +26,12 @@
 import java.util.Date;
 import java.util.List;
 
+import com.sun.org.apache.xerces.internal.util.SynchronizedSymbolTable;
 import hibernateTest.entities.Event;
 import hibernateTest.entities.Group;
 import hibernateTest.entities.Request;
+import org.hibernate.Criteria;
+import org.hibernate.criterion.Restrictions;
 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.boot.MetadataSources;
@@ -66,27 +69,57 @@
 				sessionFactory.close();
 			}
 		} catch (Exception e) {
-
+            System.out.println("Exception!");
 		}
 	}
 
 	public void testBasicUsage() {
-		// create a couple of events...
+		/*データの保存(データベースに投入)*/
 		Session session = sessionFactory.openSession();
 		session.beginTransaction();
 		session.save( new Event( "Our very first event!", new Date() ) );
 		session.save( new Event( "A follow up event", new Date() ) );
-		session.save( new Group("111", "http://test1", "famiry", "011" ) );
+		session.save( new Group("111", "http://test1", "family", "011" ) );
 		session.save( new Group("222", "http://test2", "friend", "022" ) );
-		session.save( new Request("111", "http://test01", "1999.01.01", "011", "ice", "1999.04.10",011));
-		session.save( new Request("222", "http://test01", "1999.01.01", "022", "milk", "1999.04.10",011));
+		Group newGroup = new Group("333", "http://test3", "school", "033" );
+		session.save(newGroup); //インスタンスを引数に渡すこともできます
+		session.save( new Request("111", "http://test01", "1999.01.01", "011", "cookie", "1999.04.10",011));
+		session.save( new Request("222", "http://test02", "1999.02.02", "033", "milk", "1999.04.10",011));
+		session.save( new Request("333", "http://test03", "1999.03.03", "033", "ice", "1999.04.10",011));
 		session.getTransaction().commit();
 		session.close();
 
-		// now lets pull events from the database and list them
+		/*データ(レコード)の取得し削除。*/
+		//注意: この例ではデータを取得する際、ID(主キー)を指定しているため、複数のデータが返されることを想定していません。
 		session = sessionFactory.openSession();
 		session.beginTransaction();
+		//load()メソッドを用いて取得する方法。
+		Request deleteRequest = (Request) session.load(Request.class, "222");
+		//データの削除
+		if(deleteRequest != null){
+			session.delete(deleteRequest);
+		}
+		session.getTransaction().commit();
+		session.close();
 
+		/*データを取得し更新*/
+		session = sessionFactory.openSession();
+		session.beginTransaction();
+		//createCriteriaを用いて取得する方法。ただし非推奨。
+		//http://a4dosanddos.hatenablog.com/entry/2015/03/21/135421
+		Criteria criteria = session.createCriteria(Request.class).add(Restrictions.eq("rId", "333"));
+		Request editRequest = (Request) criteria.uniqueResult();
+		//データの更新
+		if(editRequest != null) {
+			editRequest.setProduct("Chocolate ice !!");
+			session.update(editRequest);
+		}
+		session.getTransaction().commit();
+		session.close();
+
+		/*全件取得と出力*/
+		session = sessionFactory.openSession();
+		session.beginTransaction();
 		List result = session.createQuery( "from Event" ).list();
 		for ( Event event : (List<Event>) result ) {
 			System.out.println( "Event (" + event.getDate() + ") : " + event.getTitle() );
@@ -97,9 +130,8 @@
 		}
 		List requestResult = session.createQuery( "from Request" ).list();
 		for ( Request request : (List<Request>) requestResult ) {
-			System.out.println( "Request (" + request.getrId() + ") : " + request.getUri() + ": " + request.getDate() + ": " + request.isDone());
+			System.out.println( "Request (" + request.getrId() + ") : " + request.getUri() + ": " + request.getProduct());
 		}
-
 		session.getTransaction().commit();
 		session.close();
 	}
diff --git a/src/test/resources/Event.hbm.xml b/src/test/resources/Event.hbm.xml
index bceae94..047e592 100644
--- a/src/test/resources/Event.hbm.xml
+++ b/src/test/resources/Event.hbm.xml
@@ -14,7 +14,7 @@
 
     <class name="Event" table="EVENTS">
         <id name="id" column="EVENT_ID">
-            <generator class="increment"/>
+            <generator class="increment"/> <!--こいつを外すことで、idの指定が可能。-->
         </id>
         <property name="date" type="timestamp" column="EVENT_DATE"/>
         <property name="title"/>
diff --git a/src/test/resources/Group.hbm.xml b/src/test/resources/Group.hbm.xml
index 4576193..7a4a298 100644
--- a/src/test/resources/Group.hbm.xml
+++ b/src/test/resources/Group.hbm.xml
@@ -14,7 +14,6 @@
 
     <class name="Group" table="GROUPS">
         <id name="gId" column="GID">
-            <generator class="increment"/>
         </id>
         <property name="uri" column="URI"/>
         <property name="name" column="NAME"/>
diff --git a/src/test/resources/Request.hbm.xml b/src/test/resources/Request.hbm.xml
index 4184b20..d41866b 100644
--- a/src/test/resources/Request.hbm.xml
+++ b/src/test/resources/Request.hbm.xml
@@ -14,7 +14,6 @@
 
     <class name="Request" table="REQUEST">
         <id name="rId" column="RID">
-            <generator class="increment"/>
         </id>
         <property name="uri" column="URI"/>
         <property name="date" column="DATE"/>