A coastal cormorant smaller than the Japanese Cormorant, with crests and white patches in breeding season.
It is smaller than the Japanese Cormorant, with greenish-black plumage. In breeding season, the base of the bill turns red, a crest appears, and white patches form on the thighs.
It dives for fish along the coast. It breeds on Teuri Island in Hokkaido and elsewhere, and is seen along coasts across Japan outside the breeding season.
An extinction-risk assessment has not been added yet.