Obok Susan Tuna Gwanghwamun is a Japanese restaurant in Gwanghwamun that serves kaisendon, tuna, and uni. The main menu items are kaisendon and special kaisendon, with honmaguro and eel rice bowl also available. On weekdays, lunch opens at 11:30 AM, and customers wait by entering their phone number into a tablet at the entrance. Menu prices are on the high side.