diff --git a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceRuntime.cs b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceRuntime.cs
index abb8f84ea..3aa1b3298 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceRuntime.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceRuntime.cs
@@ -14,7 +14,8 @@ namespace UniVRM10
         private readonly Vrm10Instance m_target;
         private readonly VRM10Constraint[] m_constraints;
         private readonly Transform m_head;
-        private readonly FastSpringBoneScope m_fastSpringBoneScope;
+        private readonly FastSpringBoneService m_fastSpringBoneService;
+        private readonly FastSpringBoneBuffer m_fastSpringBoneBuffer;
 
         public Vrm10InstanceRuntime(Vrm10Instance target)
         {
@@ -34,12 +35,15 @@ namespace UniVRM10
                 m_constraints = target.GetComponentsInChildren<VRM10Constraint>();
             }
 
-            m_fastSpringBoneScope = CreateFastSpringBoneScheduler(m_target.SpringBone);
+            m_fastSpringBoneService = FastSpringBoneService.Instance;
+            m_fastSpringBoneBuffer = CreateFastSpringBoneBuffer(m_target.SpringBone);
+            
+            m_fastSpringBoneService.BufferCombiner.Register(m_fastSpringBoneBuffer);
         }
 
-        private FastSpringBoneScope CreateFastSpringBoneScheduler(Vrm10InstanceSpringBone springBone)
+        private FastSpringBoneBuffer CreateFastSpringBoneBuffer(Vrm10InstanceSpringBone springBone)
         {
-            return new FastSpringBoneScope(
+            return new FastSpringBoneBuffer(
                 springBone.Springs.Select(spring => new FastSpringBoneSpring
             {
                 center = m_target.SpringBoneCenter,
@@ -117,7 +121,8 @@ namespace UniVRM10
 
         public void Dispose()
         {
-            m_fastSpringBoneScope.Dispose();
+            m_fastSpringBoneService.BufferCombiner.Unregister(m_fastSpringBoneBuffer);
+            m_fastSpringBoneBuffer.Dispose();
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs
deleted file mode 100644
index 3295744f8..000000000
--- a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs
+++ /dev/null
@@ -1,29 +0,0 @@
-using System;
-using System.Collections.Generic;
-using UnityEngine;
-
-namespace UniVRM10.FastSpringBones.System
-{
-    /// <summary>
-    /// 1キャラに対応するFastSpringBoneのスコープ
-    /// </summary>
-    public class FastSpringBoneScope : IDisposable
-    {
-        private readonly FastSpringBoneService _service;
-        private readonly FastSpringBoneBuffer _buffer;
-
-        public FastSpringBoneScope(IReadOnlyList<FastSpringBoneSpring> springs)
-        {
-            _service = FastSpringBoneService.Instance;
-            _buffer = new FastSpringBoneBuffer(springs);
-            
-            _service.BufferCombiner.Register(_buffer);
-        }
-
-        public void Dispose()
-        {
-            _service.BufferCombiner.Unregister(_buffer);
-            _buffer.Dispose();
-        }
-    }
-}
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs.meta b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs.meta
deleted file mode 100644
index f0f75a237..000000000
--- a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneScope.cs.meta
+++ /dev/null
@@ -1,3 +0,0 @@
-fileFormatVersion: 2
-guid: 3531a1098413408f8abf2d7f5f8adca0
-timeCreated: 1633328902
\ No newline at end of file