U-Kwon released his first Japanese solo, "Painless" (痛くない), on June 24, 2016; the song was composed by him for the short vampire film Q Chan, in which he starred.
U-Kwon merilis solo Jepang pertamanya, "Painless" (痛くない), pada 24 Juni 2016; lagu tersebut disusun oleh dirinya sendiri untuk film pendek bertema vampir, Q Chan (Ｑちゃん), yang dibintanginya.