diff --git a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/MarketManager.cs b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/MarketManager.cs
index e3d1d266..24a1a9bc 100644
--- a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/MarketManager.cs
+++ b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/MarketManager.cs
@@ -24,7 +24,7 @@ public class MarketManager : MonoBehaviour
     private Market market;
     List<ProductData> productDataList;
     
-    private readonly Subject<int> resetRefreshTimer = new Subject<int>();
+    private readonly Subject<Unit> resetRefreshTimer = new Subject<Unit>();
     private readonly CompositeDisposable ShopClosedCompositeDisposable = new CompositeDisposable();
 
     private void Start()
@@ -67,7 +67,7 @@ public class MarketManager : MonoBehaviour
                             gameData.FinishTutorial();
                             GameDataManager.SaveGameData();
                             walkerMask.gameObject.SetActive(false);
-                            resetRefreshTimer.OnNext((int) DateTime.FromBinary(gameData.increaseCustomerTime).Subtract(DateTime.UtcNow).TotalSeconds);
+                            resetRefreshTimer.OnNext(Unit.Default);
                             SetShopView(market.CurrentShopState.Value);
                         }).AddTo(controller).AddTo(this);
                 });
@@ -118,14 +118,17 @@ public class MarketManager : MonoBehaviour
                 gameData.increaseCustomerTime = DateTime.UtcNow.AddSeconds(10).ToBinary();
 #endif
                 GameDataManager.SaveGameData();
-                resetRefreshTimer.OnNext((int) DateTime.FromBinary(gameData.increaseCustomerTime).Subtract(DateTime.UtcNow).TotalSeconds);
+                resetRefreshTimer.OnNext(Unit.Default);
             });
         }).AddTo(this);
         
+        // onNextをトリガーに実行
         IDisposable timerDisposable = null;
         resetRefreshTimer
+            .Select(_ => (int) DateTime.FromBinary(gameData.increaseCustomerTime).Subtract(DateTime.UtcNow).TotalSeconds)
             .Subscribe(time =>
             {
+                // タイマーの更新処理
                 timerDisposable?.Dispose();
                 rewardButtonView.SetButtonActive(time <= 0);
                 rewardButtonView.SetTime(time);
@@ -141,14 +144,14 @@ public class MarketManager : MonoBehaviour
                     }).AddTo(this);
             }).AddTo(this);
 
-        var remaining = (int) DateTime.FromBinary(gameData.increaseCustomerTime).Subtract(DateTime.UtcNow).TotalSeconds;
-        resetRefreshTimer.OnNext(remaining);
+        resetRefreshTimer.OnNext(Unit.Default);
         
+        // アプリ復帰時に残り時間更新
         Observable.EveryApplicationPause()
             .Where(pause => !pause)
             .Subscribe(_ =>
             {
-                resetRefreshTimer.OnNext((int) DateTime.FromBinary(gameData.increaseCustomerTime).Subtract(DateTime.UtcNow).TotalSeconds);
+                resetRefreshTimer.OnNext(Unit.Default);
             }).AddTo(this);
 
         market.IsPromotion.Subscribe(active =>