The Japanese singer redirects to here: Joseph Greenwood (Joy) There are several groups named Joy:
1) psychedelic blues rock band from San Diego, US. They released self-titled album in 2012.
2) French electronic music duo who are brothers, Lucas et Baptiste Malgoire
3) A Belgian trio with Marc Huyghens
4) An Austrian Soft-Pop-Band of the '80s. Very famous in the Far East
5) Belgian people (J.C. Maury , Patrick Fasseau) from Belgium in 1987, whose only production was the track "Elle et moi" (She and i) in 1987