diff --git a/app/src/main/java/org/ntlab/irisclient/viewmodels/GameViewModel.java b/app/src/main/java/org/ntlab/irisclient/viewmodels/GameViewModel.java
index 205eb27..c4be43e 100644
--- a/app/src/main/java/org/ntlab/irisclient/viewmodels/GameViewModel.java
+++ b/app/src/main/java/org/ntlab/irisclient/viewmodels/GameViewModel.java
@@ -376,27 +376,29 @@
         call.enqueue(new Callback<ResponseBody>() {
             @Override
             public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
-                if (response.isSuccessful()){
-                    if(hintPreData == null){
-                        try {
-                            hintMutableLiveData.setValue(response.body().string());
+                if (response.isSuccessful()) {
+                    if (response.body() != null) {
+                        if (hintPreData == null) {
+                            try {
+                                hintMutableLiveData.setValue(response.body().string());
 
-                            hintPreData = hintMutableLiveData.getValue();
-                            System.out.println("今回のヒントは" + hintPreData + "です(初回)"+hintMutableLiveData.getValue());
-                        } catch (IOException e) {
-                            e.printStackTrace();
-                        }
-                    }else if(hintMutableLiveData.getValue().equals(hintPreData)){
-                        //値が一緒なら書き換えない
-                    }else{
-                        try {
-                            hintMutableLiveData.setValue(response.body().string());
-                            hintPreData = hintMutableLiveData.getValue();
-                        } catch (IOException e) {
-                            e.printStackTrace();
-                        }
+                                hintPreData = hintMutableLiveData.getValue();
+                                System.out.println("今回のヒントは" + hintPreData + "です(初回)" + hintMutableLiveData.getValue());
+                            } catch (IOException e) {
+                                e.printStackTrace();
+                            }
+                        } else if (hintMutableLiveData.getValue().equals(hintPreData)) {
+                            //値が一緒なら書き換えない
+                        } else {
+                            try {
+                                hintMutableLiveData.setValue(response.body().string());
+                                hintPreData = hintMutableLiveData.getValue();
+                            } catch (IOException e) {
+                                e.printStackTrace();
+                            }
 
-                        System.out.println("今回のヒントは" + hintPreData + "です");
+                            System.out.println("今回のヒントは" + hintPreData + "です");
+                        }
                     }
                 }
             }
@@ -447,16 +449,18 @@
             @Override
             public void onResponse(Call<Integer> call, Response<Integer> response) {
                 if (response.isSuccessful()){
-                    if(maxPreData == null){
-                        //初回代入
-                        maxMutableLiveData.setValue(response.body());
-                        maxPreData = response.body();
-                    }else if(response.body().equals(maxPreData)){
-                        //値が一緒なら書き換えない
-                    }else{
-                        //値が異なるときのみライブデータを上書き
-                        maxMutableLiveData.setValue(response.body());
-                        maxPreData = response.body();
+                    if (response.body() != null) {
+                        if (maxPreData == null) {
+                            //初回代入
+                            maxMutableLiveData.setValue(response.body());
+                            maxPreData = response.body();
+                        } else if (response.body().equals(maxPreData)) {
+                            //値が一緒なら書き換えない
+                        } else {
+                            //値が異なるときのみライブデータを上書き
+                            maxMutableLiveData.setValue(response.body());
+                            maxPreData = response.body();
+                        }
                     }
                 }
             }
@@ -476,16 +480,16 @@
         call.enqueue(new Callback<Integer>() {
             @Override
             public void onResponse(Call<Integer> call, Response<Integer> response) {
-                if (response.isSuccessful()){
-                    if(turnNumberPreData == null){
+                if (response.isSuccessful()) {
+                    if (turnNumberPreData == null) {
                         //初回代入
                         turnNumberMutableLiveData.setValue(response.body());
                         turnNumberPreData = response.body();
                         tno = response.body();
                         System.out.println("TurnNumberは" + turnNumberPreData + "です");
-                    }else if(response.body().equals(turnNumberPreData)){
+                    } else if (response.body().equals(turnNumberPreData)) {
                         //値が一緒なら書き換えない
-                    }else{
+                    } else {
                         //値が異なるときのみライブデータを上書き
                         turnNumberMutableLiveData.setValue(response.body());
                         turnNumberPreData = response.body();