As far as I am aware they don't serve meatloaf - with or without onions. For what they do serve go here - https://www.mgmgrand.com/restaurants/shibuya-japanese-restaurant.aspx
Ok, this is one of the odder threads. "Does the gourmet Japanese restaurant serve Meatloaf?". I am going to start a "Does Memphis BBQ serve gluten free Tempura?" thread