Kissuimaru Hakata is a Japanese restaurant in the basement dining area on the west side of Hakata Station, serving grilled mackerel sets and grilled fish sets. The mackerel set comes with rice, mentaiko, and mustard greens, with the mentaiko and mustard greens refilled without limit. It opens at 7:30 a.m. and orders are placed at a kiosk at the table, and the amount of rice can be chosen at no extra charge. Mornings have seen waits of 10 to 40 minutes, so a long line delays the meal.