Sen'ichi is a sushi bar with a great selection of good Japanese sake, including local Miyagi sake and popular brands.
The Anago-no Nigiri of anago conger eel that is caught off the coast of Miyagi, cooked with just the right amount of sweetness and eaten with salt, is a must eat. It is in season starting in May and has a soft, fatty flavor. The Awabi Yawarakani (2,590 JPY (incl. tax)) of the local specialty, Japanese abalone, that has been cooked for three days, is also a specialty of this sushi restaurant. Be sure to mix it together with the nikogori (the juices that have hardened like jelly) that has a concentration of the abalone umami flavors.

Average budget: 3,000 JPY/lunch, 10,000 JPY/dinner

This restaurant that has its main branch in Arahama, a fishing town in Watari, Miyagi. The local flavors of fresh fish from the fishing town can be enjoyed at the Sendai branch as well.
The recommended item is the Oyakata Omakase Nigiri (1,700 JPY (excl. tax) and up), a chef's selection of nigiri sushi of the best ingredients of the day. The Shikimeshi, a bowl of seasonal seafood on top of rice cooked in dashi stock, is also popular. Shikimeshi for fall and winter season, Harakomeshi (bowl of salmon and salmon roe from Watari) is especially famous. The restaurant also serves a variety of food other than sushi including sashimi and tempura.

Average budget: 5,000 JPY

Ginjiro is a place where you can enjoy authentic nigiri sushi starting at 80 JPY (excl. tax) each. It is on the third floor of Sendai Station, so it is convenient to stop by in before or after sightseeing.
It also offers reasonably priced set menus such as the Daily Set of Three (500 JPY (excl. tax) and up) and Weekday Special Half-price Lunch (1,200 JPY (excl. tax)). It also has a wide selection of local sake from Miyagi including those that go well with local fish, and the limited-offer Sendaieki Masamune, a sake that is only available in Sendai Station.

Average budget: 3,000 JPY