diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
index f6b441c5c..c43f742f1 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/ControlRig/Vrm10ControlBone.cs
@@ -14,7 +14,7 @@ namespace UniVRM10
     public sealed class Vrm10ControlBone
     {
         /// <summary>
-        /// このボーンに紐づく種類。
+        /// このコントロールボーンに紐づくボーンの種類。
         /// </summary>
         public HumanBodyBones BoneType { get; }
 
@@ -24,13 +24,23 @@ namespace UniVRM10
         public Transform ControlTarget { get; }
 
         /// <summary>
-        /// コントロールのためのボーン Transform。
+        /// コントロールボーンの Transform。
         ///
         /// VRM の T-Pose 姿勢をしているときに、回転とスケールが初期値になっている（正規化）。
         /// このボーンに対して localRotation を代入し、コントロールを行う。
         /// </summary>
         public Transform ControlBone { get; }
 
+        /// <summary>
+        /// コントロールボーンの初期ローカル位置。
+        /// </summary>
+        public Vector3 InitialControlBoneLocalPosition { get; }
+
+        /// <summary>
+        /// コントロールボーンの初期ローカル回転。
+        /// </summary>
+        public Quaternion InitialControlBoneLocalRotation { get; }
+
         private readonly Quaternion _initialTargetLocalRotation;
         private readonly Quaternion _initialTargetGlobalRotation;
         private readonly List<Vrm10ControlBone> _children = new List<Vrm10ControlBone>();
@@ -50,6 +60,8 @@ namespace UniVRM10
             ControlTarget = controlTarget;
             ControlBone = new GameObject(boneType.ToString()).transform;
             ControlBone.position = controlTarget.position;
+            InitialControlBoneLocalPosition = ControlBone.localPosition;
+            InitialControlBoneLocalRotation = ControlBone.localRotation;
             _initialTargetLocalRotation = controlTarget.localRotation;
             _initialTargetGlobalRotation = controlTarget.rotation;
         }
@@ -66,9 +78,10 @@ namespace UniVRM10
             }
         }
 
-        public static Vrm10ControlBone Build(UniHumanoid.Humanoid humanoid, Dictionary<HumanBodyBones, Vrm10ControlBone> boneMap)
+        public static Vrm10ControlBone Build(UniHumanoid.Humanoid humanoid, out Dictionary<HumanBodyBones, Vrm10ControlBone> boneMap)
         {
             var hips = new Vrm10ControlBone(humanoid.Hips, HumanBodyBones.Hips);
+            boneMap = new Dictionary<HumanBodyBones, Vrm10ControlBone>();
             boneMap.Add(HumanBodyBones.Hips, hips);
 
             foreach (Transform child in humanoid.Hips)
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
index 93cf66f26..6383f8f51 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
@@ -46,12 +46,6 @@ namespace UniVRM10
             LookAt = new Vrm10RuntimeLookAt(target.Vrm.LookAt, target.Humanoid, m_head, target.LookAtTargetType, target.Gaze);
             Expression = new Vrm10RuntimeExpression(target, LookAt, LookAt.EyeDirectionApplicable);
 
-            if (!Application.isPlaying)
-            {
-                // for UnitTest
-                return;
-            }
-
             var instance = target.GetComponent<RuntimeGltfInstance>();
             if (instance != null)
             {
@@ -65,9 +59,13 @@ namespace UniVRM10
                     .ToDictionary(tf => tf, tf => new TransformState(tf));
             }
 
-            m_fastSpringBoneService = FastSpringBoneService.Instance;
-            m_fastSpringBoneBuffer = CreateFastSpringBoneBuffer(m_target.SpringBone);
-            m_fastSpringBoneService.BufferCombiner.Register(m_fastSpringBoneBuffer);
+            // NOTE: FastSpringBoneService は UnitTest などでは動作しない
+            if (Application.isPlaying)
+            {
+                m_fastSpringBoneService = FastSpringBoneService.Instance;
+                m_fastSpringBoneBuffer = CreateFastSpringBoneBuffer(m_target.SpringBone);
+                m_fastSpringBoneService.BufferCombiner.Register(m_fastSpringBoneBuffer);
+            }
         }
 
         /// <summary>
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeControlRig.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeControlRig.cs
index 7c487b1be..9adbeb807 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeControlRig.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeControlRig.cs
@@ -13,15 +13,18 @@ namespace UniVRM10
     public sealed class Vrm10RuntimeControlRig
     {
         private readonly Vrm10ControlBone _rootBone;
-        private readonly Dictionary<HumanBodyBones, Vrm10ControlBone> _bones = new Dictionary<HumanBodyBones, Vrm10ControlBone>();
+        private readonly Dictionary<HumanBodyBones, Vrm10ControlBone> _bones;
 
         public float InitialHipsHeight { get; }
 
+        /// <summary>
+        /// コンストラクタ。
+        /// humanoid は VRM T-Pose でなければならない。
+        /// </summary>
         public Vrm10RuntimeControlRig(UniHumanoid.Humanoid humanoid)
         {
-            _rootBone = Vrm10ControlBone.Build(humanoid, _bones);
+            _rootBone = Vrm10ControlBone.Build(humanoid, out _bones);
             InitialHipsHeight = _rootBone.ControlTarget.position.y;
-            Debug.Log($"InitialHipsHeight: {InitialHipsHeight}");
         }
 
         internal void Process()
@@ -41,5 +44,14 @@ namespace UniVRM10
                 return null;
             }
         }
+
+        public void EnforceTPose()
+        {
+            foreach (var bone in _bones.Values)
+            {
+                bone.ControlBone.localPosition = bone.InitialControlBoneLocalPosition;
+                bone.ControlBone.localRotation = bone.InitialControlBoneLocalRotation;
+            }
+        }
     }
 }