On July 17 , 2000 , with fellow anison vocalists Hironobu Kageyama ( Dragon Ball Z ) , Masaaki Endoh ( The King of Braves GaoGaiGar ) , Eizo Sakamoto ( vocalist of ANTHEM and Animetal ) , and Rica Matsumoto ( Pokémon ) , he formed the `` supergroup '' JAM Project .
On July 19 , 2000 , he joined as a part-time member of the supergroup JAM Project with other members - Hironobu Kageyama , Masaaki Endoh , Eizo Sakamoto , and Rica Matsumoto .