On July NUMBER@1 , NUMBER@2 , he formed -LRB- with fellow anison vocalists PERSON@1 , PERSON@2 , PERSON@3 , and PERSON@4 -RRB- the `` supergroup '' JAM Project .

On July NUMBER@1 , NUMBER@2 , he joined as a part-time member of the supergroup JAM Project with other members - PERSON@1 , PERSON@2 , PERSON@3 , and PERSON@4 .
