Slice garlic thinly and set aside.
Mix sugar, soy sauce, sake, and water in a bowl to make the sauce. Set aside.
Sprinkle salt and pepper on the steaks.
Heat the teppanyaki on medium-high heat and add oil. Add sliced garlic and cook until browned. Move the garlic to the cool side if you have the room or remove it from the teppanyaki.
Add steaks to the teppanyaki and cook for about 2 minutes per side or however you like.
Add the sauce to a small pan and reduce it for a minute.
Place the meat on a dish. Pour the reduced sauce over it, then top with the garlic for garnish.