Task: Text Simplification
Input (English): on july 19 , 2000 , he formed -lrb- with fellow anison vocalists hironobu kageyama , masaaki endoh , eizo sakamoto , and rica matsumoto -rrb- the " supergroup " jam project.
Output (English): on july 19 , 2000 , he formed the " supergroup " jam project with four other vocalists.