diff --git a/Assets/Cryville.EEW.Unity/Map/MapTileCacheManager.cs b/Assets/Cryville.EEW.Unity/Map/MapTileCacheManager.cs
index 655e806..7847a03 100644
--- a/Assets/Cryville.EEW.Unity/Map/MapTileCacheManager.cs
+++ b/Assets/Cryville.EEW.Unity/Map/MapTileCacheManager.cs
@@ -21,7 +21,7 @@ namespace Cryville.EEW.Unity.Map {
 	}
 
 	sealed class MapTileCacheManager : IDisposable {
-		public int ExtraCachedZoomLevel { get; set; } = 2;
+		public int ExtraCachedZoomLevel { get; set; } = 20;
 
 		GameObject m_prefabTile;
 		public GameObject PrefabTile {