From bceb22c6aba8c6207697adfe4489c6089aa7898a Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Mon, 28 Sep 2026 15:39:25 +0900
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---
 .../LookAt/LookAtEyeDirectionApplicableToBone.cs       | 10 +++++-----
 .../Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs      |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/Packages/VRM10/Runtime/Components/LookAt/LookAtEyeDirectionApplicableToBone.cs b/Packages/VRM10/Runtime/Components/LookAt/LookAtEyeDirectionApplicableToBone.cs
index dee0ac4ea..511266c23 100644
--- a/Packages/VRM10/Runtime/Components/LookAt/LookAtEyeDirectionApplicableToBone.cs
+++ b/Packages/VRM10/Runtime/Components/LookAt/LookAtEyeDirectionApplicableToBone.cs
@@ -20,17 +20,17 @@ namespace UniVRM10
         private readonly CurveMapper _horizontalInner;
         private readonly CurveMapper _verticalDown;
         private readonly CurveMapper _verticalUp;
-        
-        public LookAtEyeDirectionApplicableToBone(Transform leftEye, Transform rightEye,
+
+        public LookAtEyeDirectionApplicableToBone(Quaternion root, Transform leftEye, Transform rightEye,
             CurveMapper horizontalOuter, CurveMapper horizontalInner, CurveMapper verticalDown, CurveMapper verticalUp)
         {
             _leftEye = leftEye;
-            var leftEyeRotation = _leftEye.rotation;
+            var leftEyeRotation = Quaternion.Inverse(root) * _leftEye.rotation;
             _leftEyePreMultiplyRotation = _leftEye.localRotation * Quaternion.Inverse(leftEyeRotation);
             _leftEyePostMultiplyRotation = leftEyeRotation;
 
             _rightEye = rightEye;
-            var rightEyeRotation = _rightEye.rotation;
+            var rightEyeRotation = Quaternion.Inverse(root) * _rightEye.rotation;
             _rightEyePreMultiplyRotation = _rightEye.localRotation * Quaternion.Inverse(rightEyeRotation);
             _rightEyePostMultiplyRotation = rightEyeRotation;
 
@@ -39,7 +39,7 @@ namespace UniVRM10
             _verticalDown = verticalDown;
             _verticalUp = verticalUp;
         }
-        
+
         public void Apply(LookAtEyeDirection eyeDirection, Dictionary<ExpressionKey, float> actualWeights)
         {
             SetYawPitchToBones(eyeDirection);
diff --git a/Packages/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs b/Packages/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
index bdd550fc8..9bf9fada4 100644
--- a/Packages/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
+++ b/Packages/VRM10/Runtime/Components/Vrm10Runtime/Vrm10RuntimeLookAt.cs
@@ -55,7 +55,7 @@ namespace UniVRM10
             var rightEyeBone = humanoid.GetBoneTransform(HumanBodyBones.RightEye);
             if (_lookAt.LookAtType == LookAtType.bone && leftEyeBone != null && rightEyeBone != null)
             {
-                EyeDirectionApplicable = new LookAtEyeDirectionApplicableToBone(leftEyeBone, rightEyeBone, _lookAt.HorizontalOuter, _lookAt.HorizontalInner, _lookAt.VerticalDown, _lookAt.VerticalUp);
+                EyeDirectionApplicable = new LookAtEyeDirectionApplicableToBone(instance.transform.rotation, leftEyeBone, rightEyeBone, _lookAt.HorizontalOuter, _lookAt.HorizontalInner, _lookAt.VerticalDown, _lookAt.VerticalUp);
             }
             else
             {