This crustacean is known from Japan and surrounding islands.
In the single examined egg-carrying female lectotype, the body is oval, with a slightly bumpy back.
It has been recorded in the mouth of the red seabream Pagrus major.
In the single examined egg-carrying female lectotype, the head is roughly triangular, with a bluntly rounded front.
In the single examined egg-carrying female lectotype, the hind edge of the tail plate is evenly rounded.
An extinction-risk assessment has not been added yet.