Wagyu beef RUMP CAP Ikebukuro Steakhouse is a charcoal grill restaurant near the west exit of Ikebukuro Station in Tokyo, serving steak and roast beef. The signature rump cap is grilled over charcoal to bring out the flavor of the red meat, eaten with salt or a house sauce. At lunch, beef curry and steak lunch sets are available. The restaurant is in a basement, making the entrance hard to find.