diff --git a/Assets/VRM/UniVRM/Editor/Format/VRMExporterMenu.cs b/Assets/VRM/UniVRM/Editor/Format/VRMExporterMenu.cs
index eab7a87a1..539179719 100644
--- a/Assets/VRM/UniVRM/Editor/Format/VRMExporterMenu.cs
+++ b/Assets/VRM/UniVRM/Editor/Format/VRMExporterMenu.cs
@@ -60,10 +60,17 @@ namespace VRM
             var helpBuilder = new StringBuilder();
             var errorBuilder = new StringBuilder();
 
-            foreach(var msg in m_settings.CanExport())
+            foreach (var validation in m_settings.CanExport())
             {
-                isValid = false;
-                errorBuilder.Append(msg);
+                if (!validation.CanExport)
+                {
+                    isValid = false;
+                    errorBuilder.Append(validation.Message);
+                }
+                else
+                {
+                    helpBuilder.Append(validation.Message);
+                }
             }
 
             helpString = helpBuilder.ToString();
diff --git a/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs b/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
index 8728e0986..d6f57a812 100644
--- a/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
+++ b/Assets/VRM/UniVRM/Scripts/Format/VRMExportSettings.cs
@@ -50,6 +50,11 @@ namespace VRM
             {
                 return new Validation(false, msg);
             }
+
+            public static Validation Warning(string msg)
+            {
+                return new Validation(true, msg);
+            }
         }
 
         public IEnumerable<Validation> CanExport()
@@ -78,6 +83,12 @@ namespace VRM
                 yield return Validation.Error("Animator.avatar is not humanoid. Please change model's AnimationType to humanoid. ");
             }
 
+            var jaw = animator.GetBoneTransform(HumanBodyBones.Jaw);
+            if (jaw != null)
+            {
+                yield return Validation.Warning("Jaw bone is included. It may not be what you intended. Please check the humanoid avatar setting screen");
+            }
+
             if (DuplicateBoneNameExists())
             {
                 yield return Validation.Error("Find duplicate Bone names. Please check model's bone names. ");