Sushi Buster Kizamu

Two years after moving to Tokyo, Kizamu Kamoda has lost all his money and is searching for work when he stumbles upon a sushi bar. There he meets the master, a guy in nothing but a loincloth and a face right off a fish! Kizamu starts working right away, but it seems this place also performs exorcisms at night...

(Source: MANGA Plus)