diff --git a/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneJointInit.cs b/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneJointInit.cs
index 6c26edfa0..3c59eb997 100644
--- a/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneJointInit.cs
+++ b/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneJointInit.cs
@@ -34,11 +34,9 @@ namespace VRM.SpringBone
         /// <summary>
         /// Verlet積分で次の位置を計算する
         /// </summary>
-        public Vector3 VerletIntegration(float deltaTime, Transform center, Quaternion parentRotation,
-            SpringBoneSettings settings, SpringBoneJointState _state, float scalingFactor, Vector3 externalForce)
+        public Vector3 VerletIntegration(float deltaTime, Quaternion parentRotation,
+            SpringBoneSettings settings, SpringBoneJointState state, float scalingFactor, Vector3 externalForce)
         {
-            var state = _state.ToWorld(center);
-
             var nextTail = state.CurrentTail
                            + (state.CurrentTail - state.PrevTail) * (1.0f - settings.DragForce) // 前フレームの移動を継続する(減衰もあるよ)
                            + parentRotation * LocalRotation * BoneAxis * settings.StiffnessForce * deltaTime * scalingFactor // 親の回転による子ボーンの移動目標
diff --git a/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneSystem.cs b/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneSystem.cs
index 2d3cea49a..a44091bf1 100644
--- a/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneSystem.cs
+++ b/Assets/VRM/Runtime/SpringBone/Logic/SpringBoneSystem.cs
@@ -157,7 +157,8 @@ namespace VRM.SpringBone
 
             for (int i = 0; i < m_joints.Count; ++i)
             {
-                var (transform, init, state) = m_joints[i];
+                var (transform, init, _state) = m_joints[i];
+                var state = _state.ToWorld(scene.Center);
 
                 // Spring処理
                 var parentRotation = transform.parent != null ? transform.parent.rotation : Quaternion.identity;
@@ -166,7 +167,7 @@ namespace VRM.SpringBone
                 // false の場合
                 //   拡大すると移動速度はだいたい同じ => SpringBone の角速度が遅くなる
                 var scalingFactor = settings.UseRuntimeScalingSupport ? transform.UniformedLossyScale() : 1.0f;
-                var nextTail = init.VerletIntegration(deltaTime, scene.Center, parentRotation, settings, state, 
+                var nextTail = init.VerletIntegration(deltaTime, parentRotation, settings, state,
                     scalingFactor, scene.ExternalForce);
 
                 // 長さをboneLengthに強制