Lucky Mates

Lucky Mates was a collaborative idol unit between members of JK21 and Shibuya DOMINION. They debuted in April 2013 and dissolved without announcement later that year.

Members

 * Yokomine Rinon (横峯りのん)
 * Kawasumi Yui (川澄由依)
 * Yoshida Keika (吉田桂華)
 * Yoshida Mio (吉田みお)
 * Agata Miria (縣みりあ)
 * Kojima Kaho (小島果帆)

Singles

 * [2013.04.02] Ienai Teen-ager (言えない Teen-ager)