The Hisui Maru was a merchant vessel operating in the Blood Sea out of Port Cinoh. A Cinohan trade ship, it ferried cargo all over the seas.

Its last delivery was of an aberrant object to the island of Yube in 3E450. The ship left the city of Faypass, abandoning one of its crewmembers, Urata Anlyth, who would later go on to join the Phoenix Nebula.

After making its delivery to the Cult of Varkanus on Yube, the ship was destroyed by a juvenile kraken that guarded the island.