Ishi Zuki is a specialty restaurant on the fifth floor of the Shin-Marunouchi Building, connected to Tokyo Station. It serves soba and seasonal dishes, including tororo soba and duck nanban soba, along with seasonal vegetable tempura and Japanese sake. Seasonal menus are posted on Google, and there are cases of walking in without a reservation during late weekend lunches. The interior is small, so conversations from neighboring tables can be loud.