diff --git a/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java b/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
index bd5bdb3..e01c83b 100644
--- a/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
+++ b/app/src/main/java/org/ntlab/irisclient/GameMasterActivity.java
@@ -91,6 +91,7 @@
         gameViewModel.getMaxLiveData().observe(this, new Observer<Integer>() {
             @Override
             public void onChanged(Integer new_HintMax) {
+                System.out.println("Gakuto:MasterActivity ヒントマックスが更新されました");
                 EditText HintMax = findViewById(R.id.GameHintMax);
                 if(new_HintMax != 0){
                     HintMax.setText(new_HintMax.toString());
@@ -195,12 +196,15 @@
         //非アクティブであればヒントの入力を禁止する
         EditText Hint = findViewById(R.id.GameHint);
         EditText HintMax = findViewById(R.id.GameHintMax);
+        Button SendHintButton = (Button) findViewById(R.id.SendHint);
         if(isActive == false){
             Hint.setFocusable(false);
             HintMax.setFocusable(false);
+            SendHintButton.setFocusable(false);
         }else{
             Hint.setFocusable(true);
             HintMax.setFocusable(true);
+            SendHintButton.setFocusable(true);
         }
 
         //デバッグ用