diff --git a/src/UniTask.NetCore/NetCore/UniTask.Yield.cs b/src/UniTask.NetCore/NetCore/UniTask.Yield.cs
index 77768a0..4a39153 100644
--- a/src/UniTask.NetCore/NetCore/UniTask.Yield.cs
+++ b/src/UniTask.NetCore/NetCore/UniTask.Yield.cs
@@ -66,7 +66,7 @@ namespace Cysharp.Threading.Tasks
 
                 static ThreadPoolWorkItem()
                 {
-                    TaskPoolMonitor.RegisterSizeGetter(typeof(ThreadPoolWorkItem), () => pool.Size);
+                    TaskPool.RegisterSizeGetter(typeof(ThreadPoolWorkItem), () => pool.Size);
                 }
 
                 Action continuation;
diff --git a/src/UniTask.NetCoreSandbox/Program.cs b/src/UniTask.NetCoreSandbox/Program.cs
index ccc0966..706e6e0 100644
--- a/src/UniTask.NetCoreSandbox/Program.cs
+++ b/src/UniTask.NetCoreSandbox/Program.cs
@@ -236,7 +236,7 @@ namespace NetCoreSandbox
             //await c;
 
 
-            foreach (var item in Cysharp.Threading.Tasks.Internal.TaskPoolMonitor.GetCacheSizeInfo())
+            foreach (var item in Cysharp.Threading.Tasks.Internal.TaskPool.GetCacheSizeInfo())
             {
                 Console.WriteLine(item);
             }
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/CompilerServices/MoveNextRunner.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/CompilerServices/MoveNextRunner.cs
index 78e4a51..e33febd 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/CompilerServices/MoveNextRunner.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/CompilerServices/MoveNextRunner.cs
@@ -57,7 +57,7 @@ namespace Cysharp.Threading.Tasks.CompilerServices
 
         static AsyncUniTaskVoid()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncUniTaskVoid<TStateMachine>), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(AsyncUniTaskVoid<TStateMachine>), () => pool.Size);
         }
 
         public AsyncUniTaskVoid<TStateMachine> NextNode { get; set; }
@@ -129,7 +129,7 @@ namespace Cysharp.Threading.Tasks.CompilerServices
 
         static AsyncUniTask()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncUniTask<TStateMachine>), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(AsyncUniTask<TStateMachine>), () => pool.Size);
         }
 
         bool TryReturn()
@@ -240,7 +240,7 @@ namespace Cysharp.Threading.Tasks.CompilerServices
 
         static AsyncUniTask()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncUniTask<TStateMachine, T>), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(AsyncUniTask<TStateMachine, T>), () => pool.Size);
         }
 
         bool TryReturn()
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/EnumeratorAsyncExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/EnumeratorAsyncExtensions.cs
index e312519..7c658dd 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/EnumeratorAsyncExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/EnumeratorAsyncExtensions.cs
@@ -37,7 +37,7 @@ namespace Cysharp.Threading.Tasks
 
             static EnumeratorPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(EnumeratorPromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(EnumeratorPromise), () => pool.Size);
             }
 
             IEnumerator innerEnumerator;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/AddressableAsyncExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/AddressableAsyncExtensions.cs
index acfc101..8edda50 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/AddressableAsyncExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/AddressableAsyncExtensions.cs
@@ -84,7 +84,7 @@ namespace Cysharp.Threading.Tasks
 
             static AsyncOperationHandleConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource), () => pool.Size);
             }
 
             AsyncOperationHandle handle;
@@ -272,7 +272,7 @@ namespace Cysharp.Threading.Tasks
 
             static AsyncOperationHandleConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource<T>), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource<T>), () => pool.Size);
             }
 
             AsyncOperationHandle<T> handle;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DoTweenAsyncExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DoTweenAsyncExtensions.cs
index 8813878..1858776 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DoTweenAsyncExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/External/DoTweenAsyncExtensions.cs
@@ -90,7 +90,7 @@ namespace Cysharp.Threading.Tasks
 
             static TweenConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(TweenConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(TweenConfiguredSource), () => pool.Size);
             }
 
             static readonly Action<object> CancellationCallbackDelegate = CancellationCallback;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PooledDelegate.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PooledDelegate.cs
index 56d08f5..8d76d98 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PooledDelegate.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PooledDelegate.cs
@@ -11,7 +11,7 @@ namespace Cysharp.Threading.Tasks.Internal
 
         static PooledDelegate()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(PooledDelegate<T>), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(PooledDelegate<T>), () => pool.Size);
         }
 
         readonly Action<T> runDelegate;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PromisePool.cs.meta b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PromisePool.cs.meta
deleted file mode 100644
index 76cc60b..0000000
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PromisePool.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: fcb1f7467a3e2b64c8a016c8aee2f9b4
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/TaskPool.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/TaskPool.cs
index f3be551..8860854 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/TaskPool.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/TaskPool.cs
@@ -12,6 +12,7 @@ namespace Cysharp.Threading.Tasks.Internal
     public static class TaskPool
     {
         internal static int MaxPoolSize;
+        static ConcurrentDictionary<Type, Func<int>> sizes = new ConcurrentDictionary<Type, Func<int>>();
 
         static TaskPool()
         {
@@ -36,6 +37,19 @@ namespace Cysharp.Threading.Tasks.Internal
         {
             MaxPoolSize = maxPoolSize;
         }
+
+        public static IEnumerable<(Type, int)> GetCacheSizeInfo()
+        {
+            foreach (var item in sizes)
+            {
+                yield return (item.Key, item.Value());
+            }
+        }
+
+        public static void RegisterSizeGetter(Type type, Func<int> getSize)
+        {
+            sizes[type] = getSize;
+        }
     }
 
 
@@ -98,22 +112,4 @@ namespace Cysharp.Threading.Tasks.Internal
             return false;
         }
     }
-
-    public static class TaskPoolMonitor
-    {
-        static ConcurrentDictionary<Type, Func<int>> sizes = new ConcurrentDictionary<Type, Func<int>>();
-
-        public static IEnumerable<(Type, int)> GetCacheSizeInfo()
-        {
-            foreach (var item in sizes)
-            {
-                yield return (item.Key, item.Value());
-            }
-        }
-
-        public static void RegisterSizeGetter(Type type, Func<int> getSize)
-        {
-            sizes[type] = getSize;
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
index 65b02fc..cf4b6d4 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
@@ -63,7 +63,7 @@ namespace Cysharp.Threading.Tasks
 
             static YieldPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(YieldPromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(YieldPromise), () => pool.Size);
             }
 
             CancellationToken cancellationToken;
@@ -159,7 +159,7 @@ namespace Cysharp.Threading.Tasks
 
             static DelayFramePromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(DelayFramePromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(DelayFramePromise), () => pool.Size);
             }
 
             int delayFrameCount;
@@ -266,7 +266,7 @@ namespace Cysharp.Threading.Tasks
 
             static DelayPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(DelayPromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(DelayPromise), () => pool.Size);
             }
 
             float delayFrameTimeSpan;
@@ -374,7 +374,7 @@ namespace Cysharp.Threading.Tasks
 
             static DelayIgnoreTimeScalePromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(DelayIgnoreTimeScalePromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(DelayIgnoreTimeScalePromise), () => pool.Size);
             }
 
             float delayFrameTimeSpan;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.WaitUntil.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.WaitUntil.cs
index ce58448..c427816 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.WaitUntil.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.WaitUntil.cs
@@ -42,7 +42,7 @@ namespace Cysharp.Threading.Tasks
 
             static WaitUntilPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(WaitUntilPromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(WaitUntilPromise), () => pool.Size);
             }
 
             Func<bool> predicate;
@@ -154,7 +154,7 @@ namespace Cysharp.Threading.Tasks
 
             static WaitWhilePromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(WaitWhilePromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(WaitWhilePromise), () => pool.Size);
             }
 
             Func<bool> predicate;
@@ -266,7 +266,7 @@ namespace Cysharp.Threading.Tasks
 
             static WaitUntilCanceledPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(WaitUntilCanceledPromise), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(WaitUntilCanceledPromise), () => pool.Size);
             }
 
             CancellationToken cancellationToken;
@@ -362,7 +362,7 @@ namespace Cysharp.Threading.Tasks
 
             static WaitUntilValueChangedUnityObjectPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(WaitUntilValueChangedUnityObjectPromise<T, U>), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(WaitUntilValueChangedUnityObjectPromise<T, U>), () => pool.Size);
             }
 
             T target;
@@ -493,7 +493,7 @@ namespace Cysharp.Threading.Tasks
 
             static WaitUntilValueChangedStandardObjectPromise()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(WaitUntilValueChangedStandardObjectPromise<T, U>), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(WaitUntilValueChangedStandardObjectPromise<T, U>), () => pool.Size);
             }
 
             WeakReference<T> target;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskCompletionSource.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskCompletionSource.cs
index 93974b0..638e50b 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskCompletionSource.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskCompletionSource.cs
@@ -382,7 +382,7 @@ namespace Cysharp.Threading.Tasks
 
         static AutoResetUniTaskCompletionSource()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(AutoResetUniTaskCompletionSource), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(AutoResetUniTaskCompletionSource), () => pool.Size);
         }
 
         UniTaskCompletionSourceCore<AsyncUnit> core;
@@ -608,7 +608,7 @@ namespace Cysharp.Threading.Tasks
 
         static AutoResetUniTaskCompletionSource()
         {
-            TaskPoolMonitor.RegisterSizeGetter(typeof(AutoResetUniTaskCompletionSource<T>), () => pool.Size);
+            TaskPool.RegisterSizeGetter(typeof(AutoResetUniTaskCompletionSource<T>), () => pool.Size);
         }
 
         UniTaskCompletionSourceCore<T> core;
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs
index 05efb7c..23048fc 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs
@@ -82,7 +82,7 @@ namespace Cysharp.Threading.Tasks
 
             static AsyncOperationConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(AsyncOperationConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AsyncOperationConfiguredSource), () => pool.Size);
             }
 
             AsyncOperation asyncOperation;
@@ -264,7 +264,7 @@ namespace Cysharp.Threading.Tasks
 
             static ResourceRequestConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(ResourceRequestConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(ResourceRequestConfiguredSource), () => pool.Size);
             }
 
             ResourceRequest asyncOperation;
@@ -451,7 +451,7 @@ namespace Cysharp.Threading.Tasks
 
             static AssetBundleRequestConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(AssetBundleRequestConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AssetBundleRequestConfiguredSource), () => pool.Size);
             }
 
             AssetBundleRequest asyncOperation;
@@ -637,7 +637,7 @@ namespace Cysharp.Threading.Tasks
 
             static AssetBundleCreateRequestConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(AssetBundleCreateRequestConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AssetBundleCreateRequestConfiguredSource), () => pool.Size);
             }
 
             AssetBundleCreateRequest asyncOperation;
@@ -824,7 +824,7 @@ namespace Cysharp.Threading.Tasks
 
             static UnityWebRequestAsyncOperationConfiguredSource()
             {
-                TaskPoolMonitor.RegisterSizeGetter(typeof(UnityWebRequestAsyncOperationConfiguredSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(UnityWebRequestAsyncOperationConfiguredSource), () => pool.Size);
             }
 
             UnityWebRequestAsyncOperation asyncOperation;