diff --git a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneScheduler.cs b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneScheduler.cs
index c5079cfc0..014de66b6 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneScheduler.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneScheduler.cs
@@ -13,21 +13,29 @@ namespace UniVRM10.FastSpringBones.System
             _bufferCombiner = bufferCombiner;
         }
 
+        /// <summary>
+        /// SpringBone の依存関係のある Job を直列にスケジュールする
+        /// 
+        /// 1. ReconstructIfDirty
+        /// 2. PullTransformJob
+        /// 3. UpdateFastSpringBoneJob
+        /// 4. PushTransformJob
+        /// 
+        /// </summary>
         public JobHandle Schedule()
         {
-            var handle = default(JobHandle);
-            handle = _bufferCombiner.ReconstructIfDirty(handle);
+            var handle0 = _bufferCombiner.ReconstructIfDirty(default);
             if (!_bufferCombiner.HasBuffer)
             {
-                return handle;
+                return handle0;
             }
-            
-            handle = new PullTransformJob
-                {
-                    Transforms = _bufferCombiner.Transforms
-                }.Schedule(_bufferCombiner.TransformAccessArray, handle);
-            
-            handle = new UpdateFastSpringBoneJob
+
+            var handle1 = new PullTransformJob
+            {
+                Transforms = _bufferCombiner.Transforms
+            }.Schedule(_bufferCombiner.TransformAccessArray, handle0);
+
+            var handle2 = new UpdateFastSpringBoneJob
             {
                 Colliders = _bufferCombiner.Colliders,
                 Joints = _bufferCombiner.Joints,
@@ -35,14 +43,14 @@ namespace UniVRM10.FastSpringBones.System
                 Springs = _bufferCombiner.Springs,
                 Transforms = _bufferCombiner.Transforms,
                 DeltaTime = Time.deltaTime,
-            }.Schedule(_bufferCombiner.Springs.Length, 1, handle);
+            }.Schedule(_bufferCombiner.Springs.Length, 1, handle1);
 
-            handle = new PushTransformJob
-                {
-                    Transforms = _bufferCombiner.Transforms
-                }.Schedule(_bufferCombiner.TransformAccessArray, handle);
+            var handle3 = new PushTransformJob
+            {
+                Transforms = _bufferCombiner.Transforms
+            }.Schedule(_bufferCombiner.TransformAccessArray, handle2);
 
-            return handle;
+            return handle3;
         }
 
         public void Dispose()