diff --git a/.idea/misc.xml b/.idea/misc.xml
index 7e13a7a..5d9e04b 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -4,7 +4,7 @@
   <component name="JavaScriptSettings">
     <option name="languageLevel" value="ES6" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="false" project-jdk-name="12" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="false" 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/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index 8a39bf1..cdf8d01 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -7,7 +7,7 @@
 @Singleton
 public class Groups {
     private static Groups thaInstance = null;
-    private ArrayList<Group> accounts = new ArrayList<>();
+    private static ArrayList<Group> groups = new ArrayList<>();
 
     private Groups(){
 
@@ -21,53 +21,76 @@
     }
 
 
-    public HashMap<String, String> getGroupsListByUid(String uId){
+    public static HashMap<String, String> getGroupsListByUid(String uId){
         return null;
     }
 
-    public Group createGroup(String name, String uId){
+    public static Group createGroup(String name, String uId){
+        //先にGidとuriの発行を行う
+        Group testGroup = new Group("123456789", "http://test,com", name, uId);
+        groups.add(testGroup);
+        return testGroup;
+    }
+
+    public static Group getGroupByGid(String gId){
+        Group editGroup;
+        for (int i = 0; i < groups.size(); i++) {
+            editGroup = groups.get(i);
+            if (editGroup.getGid().equals(gId)) {
+                return editGroup;
+            }
+        }
         return null;
     }
 
-    public Group getGroupInfoByGid(String gId){
+    public static DeleteResult deleteGroup(String gId){
+        Group editGroup = Groups.getInstance().getGroupByGid(gId);
+        if(editGroup == null){
+            return DeleteResult.FAILURE;
+        }
+        //以下に削除処理を行う。
+        return DeleteResult.SUCCESS;
+    }
+
+    public static HashMap<String, String> getMembersListByGid(String gId){
         return null;
     }
 
-    public DeleteResult deleteGroup(String gId){
+    public static HashMap<String, String> addMember(String gId, String uId){
         return null;
     }
 
-    public HashMap<String, String> getMembersListByGid(String gId){
+    public static HashMap<String, String> deleteMember(String gId, String uId){
         return null;
     }
 
-    public HashMap<String, String> addMember(String gId, String uId){
+    public static HashMap<String, String> getRequestsListByGid(String gId){
         return null;
     }
 
-    public HashMap<String, String> deleteMember(String gId, String uId){
-        return null;
-    }
-
-    public HashMap<String, String> getRequestsListByGid(String gId){
-        return null;
-    }
-
-    public Request addRequests(String gId, String uId, String product,
+    public static Request addRequests(String gId, String uId, String product,
                                String deadline, int location){
+        //テスト用
+        Request testRequest = new Request("123456789", "http://test,com", "1999/01/01/15:00:00",
+                                            uId, product, "1999/01/01/15:00:00", 999);
+        return testRequest;
+    }
+
+    public static Request getRequestDetailByGidAndRid(String gId, String rId){
         return null;
     }
 
-    public Request getRequestDetailByGidAndRid(String gId, String rId){
-        return null;
-    }
-
-    public Request updateRequest(String gId, String rId, String uId, String product,
+    public static Request updateRequest(String gId, String rId, String uId, String product,
                                  String deadline, int location, boolean done){
-        return null;
+
+        //テスト用
+        Request testRequest = new Request("123456789", "http://test,com", "1999/01/01/15:00:00",
+                                            uId, product, "1999/01/01/15:00:00", 999);
+
+        return testRequest;
     }
 
-    public DeleteResult deleteRequest(String gId, String rId){
-        return null;
+    public static DeleteResult deleteRequest(String gId, String rId){
+        return DeleteResult.SUCCESS;
     }
 }