diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
index 599778319..24ea8a369 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10Runtime.cs
@@ -202,6 +202,12 @@ namespace UniVRM10
                 {
                     Expression.SetWeight(k, v());
                 }
+
+                // look at
+                if (VrmAnimation.LookAt.HasValue)
+                {
+                    LookAt.SetLookAtInput(VrmAnimation.LookAt.Value);
+                }
             }
 
             // 2. Control Rig
@@ -213,34 +219,16 @@ namespace UniVRM10
                 constraint.Process();
             }
 
-            // 4. Gaze control
-            LookAtInput lookAtInput = default;
-            if (VrmAnimation != null && VrmAnimation.LookAt.HasValue)
-            {
-                // VrmAnimation から LookAt を供給される
-                lookAtInput = VrmAnimation.LookAt.Value;
-            }
-            else if (m_instance.LookAtTargetType == VRM10ObjectLookAt.LookAtTargetTypes.SpecifiedTransform
+            if (m_instance.LookAtTargetType == VRM10ObjectLookAt.LookAtTargetTypes.SpecifiedTransform
             && m_instance.LookAtTarget != null)
             {
-                // Transform 追跡で 視線を計算する
-                lookAtInput = new LookAtInput { WorldPosition = m_instance.LookAtTarget.position };
-            }
-            else
-            {
-                // 事前に LookAt.SetYawPitchManually を呼び出し済みであることが期待される
-                lookAtInput = new LookAtInput { YawPitch = new LookAtEyeDirection(LookAt.Yaw, LookAt.Pitch, 0, 0) };
+                // Transform 追跡で視線を生成する。
+                // 値を上書きします。
+                LookAt.SetLookAtInput(new LookAtInput { WorldPosition = m_instance.LookAtTarget.position });
             }
 
-            LookAtEyeDirection eyeDirection = default;
-            if (lookAtInput.YawPitch.HasValue)
-            {
-                eyeDirection = lookAtInput.YawPitch.Value;
-            }
-            else if (lookAtInput.WorldPosition.HasValue)
-            {
-                eyeDirection = LookAt.Process(lookAtInput.WorldPosition.Value);
-            }
+            // 4. Gaze control
+            var eyeDirection = LookAt.Process();
 
             // 5. Apply Expression
             // LookAt の角度制限などはこちらで処理されます。
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
index db66cf427..4d140b3c5 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
@@ -4,22 +4,8 @@ using UnityEngine;
 
 namespace UniVRM10
 {
-    public sealed class Vrm10RuntimeLookAt
+    public sealed class Vrm10RuntimeLookAt : ILookAtEyeDirectionProvider
     {
-        public float Yaw { get; private set; }
-        public float Pitch { get; private set; }
-        /// <summary>
-        /// Yaw/Pitch 値を直接設定します。
-        /// LookAtTargetTypes が SpecifiedTransform の場合、ここで設定しても値は上書きされます。
-        /// </summary>
-        /// <param name="yaw">Headボーンのforwardに対するyaw角(度)</param>
-        /// <param name="pitch">Headボーンのforwardに対するpitch角(度)</param>
-        public void SetYawPitchManually(float yaw, float pitch)
-        {
-            Yaw = yaw;
-            Pitch = pitch;
-        }
-
         private readonly VRM10ObjectLookAt _lookAt;
         private readonly Transform _head;
         private readonly Vector3 _lookAtOriginTransformLocalPosition;
@@ -27,7 +13,23 @@ namespace UniVRM10
 
         internal ILookAtEyeDirectionApplicable EyeDirectionApplicable { get; }
 
+        /// <summary>
+        /// 入力値。適宜更新可。
+        /// </summary>
+        public LookAtInput LookAtInput { get; private set; }
+
+        // LookAtInput をそのまま Set
+        public void SetLookAtInput(LookAtInput eyeInput)
+        {
+            LookAtInput = eyeInput;
+        }
+
+        /// <summary>
+        /// 出力値。Process() のみが更新する
+        /// </summary>
         public LookAtEyeDirection EyeDirection { get; private set; }
+        public float Yaw => EyeDirection.LeftYaw;
+        public float Pitch => EyeDirection.LeftPitch;
 
         /// <summary>
         /// Transform that indicates the position center of eyes.
@@ -64,12 +66,33 @@ namespace UniVRM10
             }
         }
 
-        internal LookAtEyeDirection Process(Vector3 worldPosition)
+        internal LookAtEyeDirection Process()
         {
             LookAtOriginTransform.localPosition = _lookAtOriginTransformLocalPosition;
             LookAtOriginTransform.localRotation = _lookAtOriginTransformLocalRotation;
-            var (yaw, pitch) = CalculateYawPitchFromLookAtPosition(worldPosition);
-            return new LookAtEyeDirection(yaw, pitch, 0, 0);
+
+            if (LookAtInput.YawPitch is LookAtEyeDirection dir)
+            {
+                EyeDirection = dir;
+            }
+            else if (LookAtInput.WorldPosition is Vector3 worldPosition)
+            {
+                // NOTE: 指定された Transform の位置を向くように Yaw/Pitch を計算して適用する
+                var (yaw, pitch) = CalculateYawPitchFromLookAtPosition(worldPosition);
+                EyeDirection = new LookAtEyeDirection(yaw, pitch, 0, 0);
+            }
+            return EyeDirection;
+        }
+
+        /// <summary>
+        /// Yaw/Pitch 値を直接設定します。
+        /// Vrm10Instance.LookAtTargetTypes が SpecifiedTransform の場合、ここで設定しても値は上書きされます。
+        /// </summary>
+        /// <param name="yaw">Headボーンのforwardに対するyaw角(度)</param>
+        /// <param name="pitch">Headボーンのforwardに対するpitch角(度)</param>
+        public void SetYawPitchManually(float yaw, float pitch)
+        {
+            LookAtInput = new LookAtInput { YawPitch = new LookAtEyeDirection(yaw, pitch, 0, 0) };
         }
 
         public (float Yaw, float Pitch) CalculateYawPitchFromLookAtPosition(Vector3 lookAtWorldPosition)
@@ -89,5 +112,36 @@ namespace UniVRM10
 
             return lookAtOrigin;
         }
+
+        #region Obsolete
+        [Obsolete("Use " + nameof(LookAtOriginTransform))]
+        public Transform GetLookAtOrigin(Transform head)
+        {
+            return LookAtOriginTransform;
+        }
+
+        [Obsolete("Use " + nameof(SetYawPitchManually))]
+        public void SetLookAtYawPitch(float yaw, float pitch)
+        {
+            SetYawPitchManually(yaw, pitch);
+        }
+
+        [Obsolete("Use " + nameof(Yaw) + " & " + nameof(Pitch))]
+        public (float, float) GetLookAtYawPitch(
+            Transform head,
+            VRM10ObjectLookAt.LookAtTargetTypes lookAtTargetType,
+            Transform gaze)
+        {
+            switch (lookAtTargetType)
+            {
+                case VRM10ObjectLookAt.LookAtTargetTypes.SpecifiedTransform:
+                    return CalculateYawPitchFromLookAtPosition(gaze.position);
+                case VRM10ObjectLookAt.LookAtTargetTypes.YawPitchValue:
+                    return (Yaw, Pitch);
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(lookAtTargetType), lookAtTargetType, null);
+            }
+        }
+        #endregion
     }
 }