Nijūmaru Tenchikaimei (天地晦冥二重丸, Tenchikaimei Nijūmaru) is Shokujin and Shinimaru's older brother. As a full-blooded shark-yokai, he is very powerful, though he too has been unable to completely defeat Leviathan. Like most yokai seen in the series, he shows great interest in possessing several of the Shikon shards, even though he feels completely confident of his own strength. He is initially ruthless in dealing with his brother's enemies, whom he despises as a group of half-demons and filthy humans, as well as a few yokai who consort with humans. He eventually gains his own blade that is a manifestation of his own power, the Yūhikaitō.