diff --git a/Packages/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointMutable.cs b/Packages/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointMutable.cs
index ccc69d2b60..8c592ac2eb 100644
--- a/Packages/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointMutable.cs
+++ b/Packages/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointMutable.cs
@@ -38,6 +38,8 @@ public readonly struct BlittableJointMutable
         public float anglelimit2 => _data.c2.z;
         public quaternion anglelimitOffset => _data.c3.xyzw;
 
+        /// <param name="angleLimit1">pitch when Spherical</param>
+        /// <param name="angleLimit2">yaw when Spherical</param>
         public BlittableJointMutable(float stiffnessForce = 0,
             float gravityPower = 0,
             float3 gravityDir = default,
diff --git a/Packages/VRM10/Editor/Components/SpringBone/VRM10SpringBoneJointEditor.cs b/Packages/VRM10/Editor/Components/SpringBone/VRM10SpringBoneJointEditor.cs
index d2f44d2725..72ce15e8b3 100644
--- a/Packages/VRM10/Editor/Components/SpringBone/VRM10SpringBoneJointEditor.cs
+++ b/Packages/VRM10/Editor/Components/SpringBone/VRM10SpringBoneJointEditor.cs
@@ -88,7 +88,7 @@ public override void OnInspectorGUI()
             //
             // angle limit
             //
-            var fold = EditorGUILayout.Foldout(m_showAnglelimitSettings, "AngleLimit Settings (experimental)");
+            var fold = EditorGUILayout.Foldout(m_showAnglelimitSettings, $"AngleLimit Settings (1.0-draft)");
             if (m_showAnglelimitSettings != fold)
             {
                 m_showAnglelimitSettings = fold;
@@ -96,29 +96,36 @@ public override void OnInspectorGUI()
             }
             if (m_showAnglelimitSettings)
             {
-                EditorGUILayout.HelpBox("SpringBoneの角度制限はまだdraft仕様です。将来的に仕様が変更される可能性があります。また、VRMファイルへのインポート・エクスポート機能はまだ実装されていません。\nThe angle limit feature for SpringBone is still in draft status. The specifications may change in the future. Also, the import/export of VRM files has not yet been implemented.", MessageType.Warning);
+                EditorGUILayout.HelpBox("SpringBoneの角度制限はまだdraft仕様です。将来的に仕様が変更される可能性があります。\nThe angle limit feature for SpringBone is still in draft status. The specifications may change in the future.", MessageType.Warning);
 
-                EditorGUILayout.PropertyField(m_angleLimitType);
-                switch ((UniGLTF.SpringBoneJobs.AnglelimitTypes)m_angleLimitType.enumValueIndex)
+                if (isLastTail)
                 {
-                    case UniGLTF.SpringBoneJobs.AnglelimitTypes.None:
-                        break;
-
-                    case UniGLTF.SpringBoneJobs.AnglelimitTypes.Cone:
-                        EditorGUILayout.PropertyField(m_angleLimitRotation);
-                        EditorGUILayout.PropertyField(m_angleLimitPitch);
-                        break;
-
-                    case UniGLTF.SpringBoneJobs.AnglelimitTypes.Hinge:
-                        EditorGUILayout.PropertyField(m_angleLimitRotation);
-                        EditorGUILayout.PropertyField(m_angleLimitPitch);
-                        break;
-
-                    case UniGLTF.SpringBoneJobs.AnglelimitTypes.Spherical:
-                        EditorGUILayout.PropertyField(m_angleLimitRotation);
-                        EditorGUILayout.PropertyField(m_angleLimitPitch);
-                        EditorGUILayout.PropertyField(m_angleLimitYaw);
-                        break;
+                    EditorGUILayout.HelpBox("末端ノードでは無効です。", MessageType.Warning);
+                }
+                else
+                {
+                    EditorGUILayout.PropertyField(m_angleLimitType);
+                    switch ((UniGLTF.SpringBoneJobs.AnglelimitTypes)m_angleLimitType.enumValueIndex)
+                    {
+                        case UniGLTF.SpringBoneJobs.AnglelimitTypes.None:
+                            break;
+
+                        case UniGLTF.SpringBoneJobs.AnglelimitTypes.Cone:
+                            EditorGUILayout.PropertyField(m_angleLimitRotation);
+                            EditorGUILayout.PropertyField(m_angleLimitPitch, new GUIContent("Angle"));
+                            break;
+
+                        case UniGLTF.SpringBoneJobs.AnglelimitTypes.Hinge:
+                            EditorGUILayout.PropertyField(m_angleLimitRotation);
+                            EditorGUILayout.PropertyField(m_angleLimitPitch, new GUIContent("Angle"));
+                            break;
+
+                        case UniGLTF.SpringBoneJobs.AnglelimitTypes.Spherical:
+                            EditorGUILayout.PropertyField(m_angleLimitRotation);
+                            EditorGUILayout.PropertyField(m_angleLimitPitch);
+                            EditorGUILayout.PropertyField(m_angleLimitYaw);
+                            break;
+                    }
                 }
             }