diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
index 1f5fe5357..8b8baa86b 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
@@ -10,7 +10,7 @@ namespace UniVRM10
     }
 
     [Serializable]
-    public class VRM10SpringBoneCollider
+    public class VRM10SpringBoneCollider : MonoBehaviour
     {
         public VRM10SpringBoneColliderTypes ColliderType;
 
@@ -22,5 +22,74 @@ namespace UniVRM10
 
         /// <summary>bone local position</summary>
         public Vector3 Tail;
+
+        public static void DrawWireCapsule(Vector3 headPos, Vector3 tailPos, float radius)
+        {
+            var headToTail = tailPos - headPos;
+            if (headToTail.sqrMagnitude <= float.Epsilon)
+            {
+                Gizmos.DrawWireSphere(headPos, radius);
+                return;
+            }
+
+            var forward = headToTail.normalized * radius;
+
+            var xLen = Mathf.Abs(forward.x);
+            var yLen = Mathf.Abs(forward.y);
+            var zLen = Mathf.Abs(forward.z);
+            var rightWorldAxis = (yLen > xLen && yLen > zLen) ? Vector3.right : Vector3.up;
+
+            var up = Vector3.Cross(forward, rightWorldAxis).normalized * radius;
+            var right = Vector3.Cross(up, forward).normalized * radius;
+
+            const int division = 24;
+            DrawWireCircle(headPos, up, right, division, division);
+            DrawWireCircle(headPos, up, -forward, division, division / 2);
+            DrawWireCircle(headPos, right, -forward, division, division / 2);
+
+            DrawWireCircle(tailPos, up, right, division, division);
+            DrawWireCircle(tailPos, up, forward, division, division / 2);
+            DrawWireCircle(tailPos, right, forward, division, division / 2);
+
+            Gizmos.DrawLine(headPos + right, tailPos + right);
+            Gizmos.DrawLine(headPos - right, tailPos - right);
+            Gizmos.DrawLine(headPos + up, tailPos + up);
+            Gizmos.DrawLine(headPos - up, tailPos - up);
+        }
+
+        private static void DrawWireCircle(Vector3 centerPos, Vector3 xAxis, Vector3 yAxis, int division, int count)
+        {
+            for (var idx = 0; idx < division && idx < count; ++idx)
+            {
+                var s = ((idx + 0) % division) / (float)division * Mathf.PI * 2f;
+                var t = ((idx + 1) % division) / (float)division * Mathf.PI * 2f;
+
+                Gizmos.DrawLine(
+                    centerPos + xAxis * Mathf.Cos(s) + yAxis * Mathf.Sin(s),
+                    centerPos + xAxis * Mathf.Cos(t) + yAxis * Mathf.Sin(t)
+                );
+            }
+        }
+
+        public void OnDrawGizmosSelected()
+        {
+            Gizmos.color = Color.cyan;
+            Matrix4x4 mat = transform.localToWorldMatrix;
+            Gizmos.matrix = mat * Matrix4x4.Scale(new Vector3(
+                1.0f / transform.lossyScale.x,
+                1.0f / transform.lossyScale.y,
+                1.0f / transform.lossyScale.z
+                ));
+            switch (ColliderType)
+            {
+                case VRM10SpringBoneColliderTypes.Sphere:
+                    Gizmos.DrawWireSphere(Offset, Radius);
+                    break;
+
+                case VRM10SpringBoneColliderTypes.Capsule:
+                    DrawWireCapsule(Offset, Tail, Radius);
+                    break;
+            }
+        }
     }
 }
diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneColliderGroup.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneColliderGroup.cs
index 221f896d5..fece4413f 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneColliderGroup.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneColliderGroup.cs
@@ -10,82 +10,7 @@ namespace UniVRM10
     [AddComponentMenu("VRM10/VRM10SpringBoneColliderGroup")]
     public class VRM10SpringBoneColliderGroup : MonoBehaviour
     {
-        [SerializeField]
-        Color m_gizmoColor = Color.cyan;
-
         [SerializeField]
         public List<VRM10SpringBoneCollider> Colliders = new List<VRM10SpringBoneCollider>();
-
-        public static void DrawWireCapsule(Vector3 headPos, Vector3 tailPos, float radius)
-        {
-            var headToTail = tailPos - headPos;
-            if (headToTail.sqrMagnitude <= float.Epsilon)
-            {
-                Gizmos.DrawWireSphere(headPos, radius);
-                return;
-            }
-
-            var forward = headToTail.normalized * radius;
-
-            var xLen = Mathf.Abs(forward.x);
-            var yLen = Mathf.Abs(forward.y);
-            var zLen = Mathf.Abs(forward.z);
-            var rightWorldAxis = (yLen > xLen && yLen > zLen) ? Vector3.right : Vector3.up;
-
-            var up = Vector3.Cross(forward, rightWorldAxis).normalized * radius;
-            var right = Vector3.Cross(up, forward).normalized * radius;
-
-            const int division = 24;
-            DrawWireCircle(headPos, up, right, division, division);
-            DrawWireCircle(headPos, up, -forward, division, division / 2);
-            DrawWireCircle(headPos, right, -forward, division, division / 2);
-
-            DrawWireCircle(tailPos, up, right, division, division);
-            DrawWireCircle(tailPos, up, forward, division, division / 2);
-            DrawWireCircle(tailPos, right, forward, division, division / 2);
-
-            Gizmos.DrawLine(headPos + right, tailPos + right);
-            Gizmos.DrawLine(headPos - right, tailPos - right);
-            Gizmos.DrawLine(headPos + up, tailPos + up);
-            Gizmos.DrawLine(headPos - up, tailPos - up);
-        }
-
-        private static void DrawWireCircle(Vector3 centerPos, Vector3 xAxis, Vector3 yAxis, int division, int count)
-        {
-            for (var idx = 0; idx < division && idx < count; ++idx)
-            {
-                var s = ((idx + 0) % division) / (float)division * Mathf.PI * 2f;
-                var t = ((idx + 1) % division) / (float)division * Mathf.PI * 2f;
-
-                Gizmos.DrawLine(
-                    centerPos + xAxis * Mathf.Cos(s) + yAxis * Mathf.Sin(s),
-                    centerPos + xAxis * Mathf.Cos(t) + yAxis * Mathf.Sin(t)
-                );
-            }
-        }
-
-        public void OnDrawGizmosSelected()
-        {
-            Gizmos.color = m_gizmoColor;
-            Matrix4x4 mat = transform.localToWorldMatrix;
-            Gizmos.matrix = mat * Matrix4x4.Scale(new Vector3(
-                1.0f / transform.lossyScale.x,
-                1.0f / transform.lossyScale.y,
-                1.0f / transform.lossyScale.z
-                ));
-            foreach (var y in Colliders)
-            {
-                switch (y.ColliderType)
-                {
-                    case VRM10SpringBoneColliderTypes.Sphere:
-                        Gizmos.DrawWireSphere(y.Offset, y.Radius);
-                        break;
-
-                    case VRM10SpringBoneColliderTypes.Capsule:
-                        DrawWireCapsule(y.Offset, y.Tail, y.Radius);
-                        break;
-                }
-            }
-        }
     }
 }