This chain izakaya (Japanese pub-eatery) specialises in Tosa-ryōri, the food of Kōchi Prefecture in Shikoku. It's easily spotted by the giant black wave and lanterns decorating its facade, as well as the spectacular flames rising from the straw-fed grill where delicious meals such as seared bonito and chicken are prepared.
There are several other branches around town, including in Roppongi as well as the associated Shimanto-gawa in Yūrakuchō.