diff --git a/popcorn/Assets/MyGame/Scenes/WorldMap/Scripts/WorldMap.cs b/popcorn/Assets/MyGame/Scenes/WorldMap/Scripts/WorldMap.cs
index 4030cb9d..6e0db18f 100644
--- a/popcorn/Assets/MyGame/Scenes/WorldMap/Scripts/WorldMap.cs
+++ b/popcorn/Assets/MyGame/Scenes/WorldMap/Scripts/WorldMap.cs
@@ -104,7 +104,7 @@ namespace MyGame.Scenes.WorldMap.Scripts
                 }
                 
                 // バイト強化可能か判定
-                if (PartTimerManager.CheckLevelUp(cityIcon.CityId))
+                if (!GameDataUtils.CheckLatestCity(cityIcon.CityId) && PartTimerManager.CheckLevelUp(cityIcon.CityId))
                 {
                     // 強化可能
                     cityIcon.SetNotify(true);
@@ -129,12 +129,9 @@ namespace MyGame.Scenes.WorldMap.Scripts
                             // 指定の都市に遷移
                             earningView.OnClick.Subscribe(_ =>
                             {
-                                globalGameData.CurrentCityId = cityIcon.CityId;
-                                WorldMarketManager.Instance.UpdateCurrentCity(cityIcon.CityId);
-                                GameDataObserver.Instance.ChangeCity(cityIcon.CityId);
-                                GameDataObserver.Instance.CheckMissionProgress();
-                                TransitionManager.Instance.LoadScene(GameScenes.Main);
+                                ChangeCity(cityIcon.CityId);
                                 LocalCacheManager.Save(Const.ChangeCityFlagTag, true);
+                                TransitionManager.Instance.LoadScene(GameScenes.Main);
                             }).AddTo(citySelectDisposable);
                         }
                         fundingView.ResetView();
@@ -223,5 +220,13 @@ namespace MyGame.Scenes.WorldMap.Scripts
             var coinProgress = (float)partTimerData.sales / 10 * elapsed / partTimerData.maxSales;
             return (heartProgress, coinProgress);
         }
+
+        public static void ChangeCity(int cityId)
+        {
+            GameDataManager.GameData.CurrentCityId = cityId;
+            WorldMarketManager.Instance.UpdateCurrentCity(cityId);
+            GameDataObserver.Instance.ChangeCity(cityId);
+            GameDataObserver.Instance.CheckMissionProgress();
+        }
     }
 }
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