diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index d8d8714..a20886e 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -6,12 +6,12 @@
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleHome" value="C:/ProgramData/chocolatey/lib/gradle/tools/gradle-4.10.2" />
-        <option name="gradleJvm" value="1.8" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 4ff842e..bc8d0a3 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,14 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="EntryPointsManager">
-    <list size="1">
-      <item index="0" class="java.lang.String" itemvalue="com.fasterxml.jackson.annotation.JsonIgnore" />
-    </list>
-  </component>
-  <component name="JavaScriptSettings">
-    <option name="languageLevel" value="ES6" />
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/sbt.xml b/.idea/sbt.xml
deleted file mode 100644
index 2018743..0000000
--- a/.idea/sbt.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ScalaSbtSettings">
-    <option name="customVMPath" />
-  </component>
-</project>
\ No newline at end of file
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 47ac114..6ad2e98 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Group.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Group.java
@@ -3,7 +3,7 @@
 
 import com.example.cosmos_serversb.models.SessionManager;
 import com.example.cosmos_serversb.models.Users;
-import com.sun.corba.se.impl.orbutil.graph.Graph;
+//import com.sun.corba.se.impl.orbutil.graph.Graph;
 import org.hibernate.Session;
 
 import java.util.ArrayList;
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 4da04c6..af44d36 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Request.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Request.java
@@ -1,9 +1,12 @@
 //このクラスは仮です
 package com.example.cosmos_serversb.entities;
 
+import java.util.Date;
+
 public class Request {
     private String rId;
-    private String uri, date, IssuerUid, product, deadline;
+    private String uri, IssuerUid, product;
+    private Date date, deadline;
     private int location;// YahooローカルサーチAPIの業種コード
     private boolean done = false;
 
@@ -11,7 +14,7 @@
 
     }
 
-    public Request(String rId, String uri, String date, String IssuerUid, String product, String deadline, int location){
+    public Request(String rId, String uri, Date date, String IssuerUid, String product, Date deadline, int location){
         setrId(rId);
         setUri(uri);
         setDate(date);
@@ -30,7 +33,6 @@
         return rId;
     }
 
-
     private void setUri(String uri){
         this.uri = uri;
     }
@@ -39,11 +41,11 @@
         return uri;
     }
 
-    private void setDate(String date){
+    private void setDate(Date date){
         this.date = date;
     }
 
-    public String getDate() {
+    public Date getDate() {
         return date;
     }
 
@@ -63,11 +65,11 @@
         this.product = product;
     }
 
-    public String getDeadline() {
+    public Date getDeadline() {
         return deadline;
     }
 
-    public void setDeadline(String deadline) {
+    public void setDeadline(Date deadline) {
         this.deadline = deadline;
     }
 
diff --git a/src/main/java/com/example/cosmos_serversb/jsons/GroupJson.java b/src/main/java/com/example/cosmos_serversb/jsons/GroupJson.java
index 3d53ca4..b807883 100644
--- a/src/main/java/com/example/cosmos_serversb/jsons/GroupJson.java
+++ b/src/main/java/com/example/cosmos_serversb/jsons/GroupJson.java
@@ -63,7 +63,7 @@
         this.members = members;
     }
 
-    public ArrayList<RidUriJson> getRequest() {
+    public ArrayList<RidUriJson> getRequests() {
         return requests;
     }
 
diff --git a/src/main/java/com/example/cosmos_serversb/jsons/UsersMapJson.java b/src/main/java/com/example/cosmos_serversb/jsons/UsersMapJson.java
new file mode 100644
index 0000000..c44487a
--- /dev/null
+++ b/src/main/java/com/example/cosmos_serversb/jsons/UsersMapJson.java
@@ -0,0 +1,29 @@
+package com.example.cosmos_serversb.jsons;
+
+import com.example.cosmos_serversb.entities.Group;
+import com.example.cosmos_serversb.entities.User;
+
+import java.util.ArrayList;
+import java.util.Set;
+
+public class UsersMapJson {
+    private ArrayList<UidUriJson> users = new ArrayList<>();
+
+    public UsersMapJson(Group group) {
+        changeUsersMap(group.getMembers());
+    }
+
+    public ArrayList<UidUriJson> getUsers() {
+        return users;
+    }
+
+    public void setUsers(ArrayList<UidUriJson> users) {
+        this.users = users;
+    }
+
+    private void changeUsersMap(Set set) {
+        for (User user : (Set<User>) set) {
+            users.add(new UidUriJson(user));
+        }
+    }
+}
diff --git a/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index db5cd0b..506c6b2 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -2,6 +2,7 @@
 
 import java.util.*;
 import javax.inject.Singleton;
+import java.util.Date;
 
 import com.example.cosmos_serversb.entities.*;
 import com.example.cosmos_serversb.jsons.*;
@@ -83,14 +84,15 @@
         return null;
     }
 
-    public static HashMap<String, String> addMember(String gId, String uId){
+    public static UsersMapJson addMember(String gId, String uId){
         Session session = SessionManager.getInstance().getSession();
         Group editGroup = session.load(Group.class, gId);
         if(editGroup != null) {
             editGroup.addMember(uId);
             session.update(editGroup);
         }
-        return null;//HashMapへの変更が必要
+        UsersMapJson usersMapJson = new UsersMapJson(editGroup);
+        return usersMapJson;
     }
 
     public static HashMap<String, String> deleteMember(String gId, String uId){
@@ -105,8 +107,8 @@
         //テスト用
         String rId = getInstance().createRId();
         String uri = baseURI + AppName + "/groups/" + gId + "/requests/" + rId;
-        Request testRequest = new Request(rId, uri, "1999/01/01/15:00:00",
-                                            uId, product, "1999/01/01/15:00:00", 999);
+        Request testRequest = new Request(rId, uri, new Date(1999,01,01),
+                                            uId, product, new Date(1999,12,01), 999);
         return testRequest;
     }
 
@@ -117,8 +119,8 @@
     public static Request updateRequest(String gId, String rId, String uId, String product, String deadline, int location, boolean done){
 
         //テスト用
-        Request testRequest = new Request(rId, "http://test.com", "1999/01/01/15:00:00",
-                                            uId, product, "1999/01/01/15:00:00", 999);
+        Request testRequest = new Request(rId, "http://test.com", new Date(1999,01,01),
+                                            uId, product, new Date(1999,12,01), 999);
 
         return testRequest;
     }
diff --git a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
index 50e4f9f..92e07a7 100644
--- a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
+++ b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
@@ -29,7 +29,7 @@
 import java.util.Set;
 
 import com.example.cosmos_serversb.resources.UsersRest;
-import com.sun.org.apache.xerces.internal.util.SynchronizedSymbolTable;
+//import com.sun.org.apache.xerces.internal.util.SynchronizedSymbolTable;
 import hibernateTest.entities.Event;
 import hibernateTest.entities.Group;
 import hibernateTest.entities.Request;