Sumo-sized portions of tasty and authentic ramen noodles are the lure here, and quite a lure they are. This place is always crowded, yet in this most-touristy area of town, you rarely encounter visitors. They’d have trouble squeezing past the legions of office workers, many originally from Japan, who make this place their unofficial canteen. My favorite soup: the tantan-men, which is topped with a spicy sesame paste.