Ookuma Japanese Burger Crispy breaded chicken, a fistful of pickles, and a blanket of tartar sauce are all this burger needs. As I wrote previously, you can’t eat the burger without a mountain of napkins, thanks to the housemade tartar sauce loaded with chopped egg. Miraculously, the fried chicken stays crisp underneath. It’s a creamy summer delight, which is good, since seating here is in the great (shaded) outdoors.