Shokujin Tenchikaimei (天地晦冥蝕甚, Tenchikaimei Shokujin) is a full-blooded shark-daiyokai, possessing tremendous power. He rules from under Japan's, Sea of Japan. He is the primary antagonist of the Inuyasha Fanfiction universe. At first his goals seem obscure, however, later it is revealed that he has an unknown plan involving his ability to create yōkai. It is still not known what exactly he intends to do with his powers, or what his ambitions are as of yet.