diff --git a/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableLogic.cs b/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableLogic.cs
index 16eea4635..31397d8c7 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableLogic.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableLogic.cs
@@ -9,7 +9,6 @@ namespace UniVRM10.FastSpringBones.Blittables
     [Serializable]
     public struct BlittableLogic
     {
-        public int transformIndexOffset;
         public int parentTransformIndex;
         public int headTransformIndex;
         public float length;
diff --git a/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableSpring.cs b/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableSpring.cs
index 344dcabd8..36f6d7401 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableSpring.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/Blittables/BlittableSpring.cs
@@ -12,5 +12,6 @@ namespace UniVRM10.FastSpringBones.Blittables
         public BlittableSpan colliderSpan;
         public BlittableSpan logicSpan;
         public int centerTransformIndex;
+        public int transformIndexOffset;
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneBuffer.cs
similarity index 100%
rename from Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs
rename to Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneBuffer.cs
diff --git a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs.meta b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneBuffer.cs.meta
similarity index 100%
rename from Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs.meta
rename to Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneBuffer.cs.meta
diff --git a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
index cf15a9609..23361739a 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
@@ -155,6 +155,7 @@ namespace UniVRM10.FastSpringBones.System
                     DestSprings = new NativeSlice<BlittableSpring>(_springs, springsOffset, buffer.Springs.Length),
                     CollidersOffset = collidersOffset,
                     LogicsOffset = logicsOffset,
+                    TransformOffset = transformOffset
                 }.Schedule(buffer.Springs.Length, 1, handle);
                 handle = new LoadCollidersJob()
                 {
@@ -168,7 +169,6 @@ namespace UniVRM10.FastSpringBones.System
                     SrcJoints = buffer.Joints,
                     DestLogics = new NativeSlice<BlittableLogic>(_logics, logicsOffset, buffer.Logics.Length),
                     DestJoints = new NativeSlice<BlittableJoint>(_joints, logicsOffset, buffer.Logics.Length),
-                    TransformOffset = transformOffset
                 }.Schedule(buffer.Logics.Length, 1, handle);
 
                 springsOffset += buffer.Springs.Length;
@@ -238,12 +238,14 @@ namespace UniVRM10.FastSpringBones.System
 
             public int CollidersOffset;
             public int LogicsOffset;
+            public int TransformOffset;
 
             public void Execute(int index)
             {
                 var spring = SrcSprings[index];
                 spring.colliderSpan.startIndex += CollidersOffset;
                 spring.logicSpan.startIndex += LogicsOffset;
+                spring.transformIndexOffset = TransformOffset;
                 DestSprings[index] = spring;
             }
         }
@@ -258,8 +260,7 @@ namespace UniVRM10.FastSpringBones.System
 
             public void Execute(int index)
             {
-                var collider = SrcColliders[index];
-                DestColliders[index] = collider;
+                DestColliders[index] =  SrcColliders[index];
             }
         }
 
@@ -272,13 +273,10 @@ namespace UniVRM10.FastSpringBones.System
             [ReadOnly] public NativeSlice<BlittableJoint> SrcJoints;
             [WriteOnly] public NativeSlice<BlittableLogic> DestLogics;
             [WriteOnly] public NativeSlice<BlittableJoint> DestJoints;
-            public int TransformOffset;
 
             public void Execute(int index)
             {
-                var logic = SrcLogics[index];
-                logic.transformIndexOffset = TransformOffset;
-                DestLogics[index] = logic;
+                DestLogics[index] = SrcLogics[index];
                 DestJoints[index] = SrcJoints[index];
             }
         }
diff --git a/Assets/VRM10/Runtime/FastSpringBone/System/UpdateFastSpringBoneJob.cs b/Assets/VRM10/Runtime/FastSpringBone/System/UpdateFastSpringBoneJob.cs
index 5b3a5a61e..ef63511c7 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/System/UpdateFastSpringBoneJob.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/System/UpdateFastSpringBoneJob.cs
@@ -27,6 +27,7 @@ namespace UniVRM10.FastSpringBones.System
         public void Execute(int index)
         {
             var spring = Springs[index];
+            var transformIndexOffset = spring.transformIndexOffset;
             var colliderSpan = spring.colliderSpan;
             var logicSpan = spring.logicSpan;
 
@@ -35,12 +36,12 @@ namespace UniVRM10.FastSpringBones.System
                 var logic = Logics[logicIndex];
                 var joint = Joints[logicIndex];
 
-                var headTransform = Transforms[logic.headTransformIndex + logic.transformIndexOffset];
+                var headTransform = Transforms[logic.headTransformIndex + transformIndexOffset];
                 var parentTransform = logic.parentTransformIndex >= 0
-                    ? Transforms[logic.parentTransformIndex + logic.transformIndexOffset]
+                    ? Transforms[logic.parentTransformIndex + transformIndexOffset]
                     : (BlittableTransform?)null;
                 var centerTransform = spring.centerTransformIndex >= 0
-                    ? Transforms[spring.centerTransformIndex + logic.transformIndexOffset]
+                    ? Transforms[spring.centerTransformIndex + transformIndexOffset]
                     : (BlittableTransform?)null;
 
 
@@ -76,7 +77,7 @@ namespace UniVRM10.FastSpringBones.System
                 for (var colliderIndex = colliderSpan.startIndex; colliderIndex < colliderSpan.startIndex + colliderSpan.count; ++colliderIndex)
                 {
                     var collider = Colliders[colliderIndex];
-                    var colliderTransform = Transforms[collider.transformIndex + logic.transformIndexOffset];
+                    var colliderTransform = Transforms[collider.transformIndex + transformIndexOffset];
                     var colliderScale = colliderTransform.localToWorldMatrix.lossyScale;
                     var absColliderScale = math.abs(colliderScale);
                     var maxColliderScale = math.max(math.max(absColliderScale.x, absColliderScale.y), absColliderScale.z);
@@ -134,7 +135,7 @@ namespace UniVRM10.FastSpringBones.System
                 }
 
                 // 値をバッファに戻す
-                Transforms[logic.headTransformIndex + logic.transformIndexOffset] = headTransform;
+                Transforms[logic.headTransformIndex + transformIndexOffset] = headTransform;
                 Logics[logicIndex] = logic;
             }
         }