Kanazawa is a very popular tourist destination because of many amazing sightseeing spots which includes one of the most famous seafood market in the country: Kanazawa's Omicho Fish Market. If you are in Kanazawa, the place is absolutely a must-go for both its atmosphere and the fresh seafood you can have there.
Tucked away on the third floor of a building on the opposite side of Shibuya station in area not frequented by many tourists is a beautiful quaint craft beer and sake bar, Taki. Matching some of the best beer and sake you try in Tokyo with delicate dishes, you're guaranteed to enjoy this hidden gem.
If you're looking for a great izakaya (Japanese style bar) or a big fan of seafood, you should try Isomaru Suisan. It is a causal chain restaurant often found near stations in Tokyo and the cities. The fresh seafood grilled in front of you is amazing! It's a place where you can order seafood and grill it yourself in the tiny grill they provide: clams, scallops and squid.