diff --git a/Assets/VRM10/Runtime/Components/Constraint/Vrm10AimConstraint.cs b/Assets/VRM10/Runtime/Components/Constraint/Vrm10AimConstraint.cs
index 5121f485b..72d364c82 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/Vrm10AimConstraint.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/Vrm10AimConstraint.cs
@@ -38,7 +38,7 @@ namespace UniVRM10
 
         Quaternion _dstRestLocalQuat;
 
-        void Awake()
+        void Start()
         {
             if (Source == null)
             {
diff --git a/Assets/VRM10/Runtime/Components/Constraint/Vrm10RollConstraint.cs b/Assets/VRM10/Runtime/Components/Constraint/Vrm10RollConstraint.cs
index 204e7405a..56993a704 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/Vrm10RollConstraint.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/Vrm10RollConstraint.cs
@@ -35,7 +35,7 @@ namespace UniVRM10
         Quaternion _srcRestLocalQuat;
         Quaternion _dstRestLocalQuat;
 
-        void Awake()
+        void Start()
         {
             if (Source == null)
             {
diff --git a/Assets/VRM10/Runtime/Components/Constraint/Vrm10RotationConstraint.cs b/Assets/VRM10/Runtime/Components/Constraint/Vrm10RotationConstraint.cs
index 9cf573896..848f0539b 100644
--- a/Assets/VRM10/Runtime/Components/Constraint/Vrm10RotationConstraint.cs
+++ b/Assets/VRM10/Runtime/Components/Constraint/Vrm10RotationConstraint.cs
@@ -20,7 +20,7 @@ namespace UniVRM10
         Quaternion _srcRestLocalQuatInverse;
         Quaternion _dstRestLocalQuat;
 
-        void Awake()
+        void Start()
         {
             if (Source == null)
             {