Inaniwa Udon Nanakura is an udon shop on the second floor of the Shinbashi Station-mae Building in Minato City, Tokyo. It serves Akita-style Inaniwa udon, with chewy noodles dipped in a distinctive sauce that contains mushrooms, and sets that include sakadon or chirashizushi. It is open only for lunch on weekdays from 11 a.m. to 3 p.m., with payment made in advance at the entrance and a last order at 2:30 p.m. Weekday lunches can involve a 30-minute to one-hour wait, and guests often share the long tables with strangers.