Hamburger Steak Grill Omiya is a Japanese-Western restaurant on the 7th floor of Grand Front Osaka South Building in Kita Ward, Osaka. It serves hamburg steak and steak with demiglace, garlic, and curry sauces, along with omurice hamburg and steak, and sets come with salad, soup, and a choice of rice or bread. The restaurant notes that hamburg takes about 15 to 20 minutes after ordering, and the windows look out over the Osaka night view. The hamburg can feel heavy as you eat it.