"OSAKA" [大阪市] is a song from the third Extended Play 'Free' and the Mini-Album 'Road to Japan'. After it's release, fans claim that this song is one of his most popular songs alongside his other song "Emblem of Scars" and confirmed that the song was going to be played on radio.
During the TRUTHSt4lk3rz livestream, SARE has confirmed that there will be a remix contest for Osaka, no further detail has been confirmed so far.