Located above a fish market, this casual restaurant is a popular local spot for kaisen-don (raw seafood on rice; ¥1400 to ¥1950), but there are also tempura and grilled items on the menu. Between November and March you can splash out on crab feasts (from ¥10,000 per person). It's on a corner, with a ship's hull over the entrance.
You can also pick out your own seafood at the market and have the kitchen prepare it for you (at a roughly 40% mark-up from market rates).