Shake Shack Tokyo International Forum Shop sells burgers and shakes and sits inside Tokyo International Forum, near Yurakucho Station. The Double ShackBurger comes with two patties and thick cheese, which brings out the meat flavor and juices, and the fries are crinkle-cut. You take a seat first, pay at the self-order register, then wait until the buzzer rings. At lunch and dinner peaks, seats fill quickly and waits after ordering can run past 10 minutes.