diff --git a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ProductManagement.cs b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ProductManagement.cs
index e8976fde..0246b5de 100644
--- a/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ProductManagement.cs
+++ b/popcorn/Assets/MyGame/Scenes/marketing/Scripts/ProductManagement.cs
@@ -90,7 +90,7 @@ public class ProductManagement : MonoBehaviour
                         Action<int> purchaseAction = amount =>
                         {
                             // タンク追加
-                            gameData.StorageTanks.Add(new StorageTank() {Capacity = 50});
+                            gameData.StorageTanks.Add(new StorageTank() {Capacity = Const.TankCapacity});
                             tankView.SetData(gameData.StorageTanks[tankView.TankNumber - 1]);
                             tankView.SetState(TankState.Unlock);
                             CoinManager.Instance.SubCoin(shopData.price);
diff --git a/popcorn/Assets/MyGame/Scripts/Const.cs b/popcorn/Assets/MyGame/Scripts/Const.cs
index dfc5e6a8..e4a96164 100644
--- a/popcorn/Assets/MyGame/Scripts/Const.cs
+++ b/popcorn/Assets/MyGame/Scripts/Const.cs
@@ -10,6 +10,7 @@ public static class Const {
     public static readonly int DefaultMachineLevel = 1;
     public static readonly int DefaultRecipeId = 1;
     public static readonly int DefaultPanId = 1;
+    public static readonly int TankCapacity = 20;
     public static readonly int SpecialShopLevel = 9999;
     public static readonly int SpecialCategory = 9999;
     public static readonly int NotSetMaterialId = 0;
diff --git a/popcorn/Assets/MyGame/Scripts/GameDataManager.cs b/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
index a9246e42..cefe4b50 100644
--- a/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
+++ b/popcorn/Assets/MyGame/Scripts/GameDataManager.cs
@@ -311,7 +311,7 @@ public sealed class GameData {
         {
             StorageTanks.Add(new StorageTank
                 {
-                    Capacity = 50,
+                    Capacity = Const.TankCapacity,
                     FlavorId = -1,
                 }
             );