Iwato Ginza is a Japanese restaurant in Ginza 1-chome that serves maguro gomadare chū and tonjiru. The tuna is mixed with sesame sauce and served over rice, with rice, miso soup, and pickled ginger available for free refills. The restaurant opened in 1977 and operates from 11 a.m., with customers buying a meal ticket before ordering. A line forms at lunch, and when the seats are full, customers may share a table.