diff --git a/app/src/main/java/org/ntlab/acanthus_client/entities/FollowJson.java b/app/src/main/java/org/ntlab/acanthus_client/entities/FollowJson.java
index 0ed8392..17e895c 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/entities/FollowJson.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/entities/FollowJson.java
@@ -1,16 +1,16 @@
 package org.ntlab.acanthus_client.entities;
 
-import java.util.HashMap;
+import java.util.ArrayList;
 
 public class FollowJson {
-    private HashMap<Integer, String> follows = new HashMap<>();
+    private ArrayList<Integer> followUids;
+    private ArrayList<String> followNames;
 
-    public HashMap<Integer, String> getFollows() {
-        return follows;
+    public ArrayList<Integer> getFollowUids(){
+        return followUids;
     }
 
-    public void setFollows(HashMap<Integer, String> follows) {
-        this.follows = follows;
+    public ArrayList<String> getFollowNames(){
+        return followNames;
     }
-
 }
diff --git a/app/src/main/java/org/ntlab/acanthus_client/entities/FollowerJson.java b/app/src/main/java/org/ntlab/acanthus_client/entities/FollowerJson.java
index bfbcf0b..ff71c31 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/entities/FollowerJson.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/entities/FollowerJson.java
@@ -1,16 +1,16 @@
 package org.ntlab.acanthus_client.entities;
 
-import java.util.HashMap;
+import java.util.ArrayList;
 
 public class FollowerJson {
-    private HashMap<Integer, String> followers = new HashMap<>();
+    private ArrayList<Integer> followerUids;
+    private ArrayList<String> followerNames;
 
-    public HashMap<Integer, String> getFollowers() {
-        return followers;
+    public ArrayList<Integer> getFollowerUids(){
+        return followerUids;
     }
 
-    public void setFollowers(HashMap<Integer, String> followers) {
-        this.followers = followers;
+    public ArrayList<String> getFollowerNames(){
+        return followerNames;
     }
-
 }
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/UserPageActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/UserPageActivity.java
index d25add8..3081e4f 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/UserPageActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/UserPageActivity.java
@@ -26,7 +26,7 @@
 
     private UserPageViewModel userPageViewModel;
     private Acanthus acanthus;
-    private Collection<Integer> followsList = new ArrayList<>();
+    private Collection<Integer> followsUidList = new ArrayList<>();
 
     @Override
     protected void onCreate(Bundle savedInstanceState){
@@ -70,9 +70,9 @@
         userPageViewModel.getFollowJson().observe(this, new Observer<FollowJson>() {
             @Override
             public void onChanged(@Nullable FollowJson followJson) {
-                followsList = followJson.getFollows().keySet();
+                followsUidList = followJson.getFollowUids();
 
-                if (followsList.contains(uid2)) {
+                if (followsUidList.contains(uid2)) {
                     followUserButton.setText("フォロー解除");
                 }else{
                     followUserButton.setText("フォローする");
@@ -85,13 +85,13 @@
         followUserButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                if (!followsList.contains(uid2)) {
+                if (!followsUidList.contains(uid2)) {
                     userPageViewModel.addFollow(uid, token, uid2);
-                    followsList.add(uid2);
+                    followsUidList.add(uid2);
                     followUserButton.setText("フォロー解除");
                 }else{
                     userPageViewModel.releaseFollow(uid, token, uid2);
-                    followsList.remove(uid2);
+                    followsUidList.remove(uid2);
                     followUserButton.setText("フォローする");
                 }
             }
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followList/FollowListActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followList/FollowListActivity.java
index 358a85b..e3a7348 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followList/FollowListActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followList/FollowListActivity.java
@@ -49,8 +49,8 @@
         userPageViewModel.getFollowJson().observe(this, new Observer<FollowJson>() {
             @Override
             public void onChanged(FollowJson followJson) {
-                ArrayList<Integer> followUidList = (ArrayList<Integer>) followJson.getFollows().keySet();
-                ArrayList<String> followNameList = (ArrayList<String>) followJson.getFollows().values();
+                ArrayList<Integer> followUidList = followJson.getFollowUids();
+                ArrayList<String> followNameList = followJson.getFollowNames();
                 BaseAdapter adapter = new UserListViewAdapter(getApplication(), R.layout.follow_or_follower_list, followNameList);
 
                 listView.setAdapter(adapter);
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followerList/FollowerListActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followerList/FollowerListActivity.java
index 9bf7595..e001d96 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followerList/FollowerListActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/followerList/FollowerListActivity.java
@@ -51,8 +51,8 @@
         userPageViewModel.getFollowerJson().observe(this, new Observer<FollowerJson>() {
             @Override
             public void onChanged(@Nullable FollowerJson followerJson) {
-                ArrayList<Integer> followerUidList = (ArrayList<Integer>) followerJson.getFollowers().keySet();
-                ArrayList<String> followerNameList = (ArrayList<String>) followerJson.getFollowers().values();
+                ArrayList<Integer> followerUidList = followerJson.getFollowerUids();
+                ArrayList<String> followerNameList = followerJson.getFollowerNames();
                 BaseAdapter adapter = new UserListViewAdapter(getApplication(), R.layout.follow_or_follower_list, followerNameList);
 
                 listView.setAdapter(adapter);
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/workList/WorkListActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/workList/WorkListActivity.java
index 59a7182..26ed5ca 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/userpage/workList/WorkListActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/userpage/workList/WorkListActivity.java
@@ -71,7 +71,7 @@
                 Collections.sort(listEntries, new Comparator<Map.Entry<String, AnimationJson>>() {
                     @Override
                     public int compare(Map.Entry<String, AnimationJson> o1, Map.Entry<String, AnimationJson> o2) {
-                        return o1.getKey().compareTo(o2.getKey());
+                        return o2.getKey().compareTo(o1.getKey());
                     }
                 });
                 for (Map.Entry<String, AnimationJson> entry : listEntries){