Double Four

Double Four (ダブルフォー) was an idol group based out of the RIO idol cafe in Sendai. They were active from December 6, 2013 until February 2018.

Final Line-up

 * Kosaka Satomi (幸坂さとみ) (2nd Gen)
 * Aoki Cocoa (青木心愛) (2nd Gen)
 * Aoki Hiyori (青木日和) (3rd Gen)
 * Arimura Runa (有村瑠奈) (Joined February 2016)
 * Yuuki Nana (結城菜々) (Joined 2017?)

Former Members
(Incomplete)
 * Amatsuki Rika (天月りか) (1st Gen; left before 2015)
 * 真夢藍 (3rd Gen; left unknown)
 * Suzuki Kizuna (涼木絆) (4th Gen; left unknown)
 * Mikami Yua (三上優愛) (2nd Gen; graduated August 2015)
 * Tachibana Suzuka (立花涼華) (4th Gen; left December 2015)
 * Kashiwagi Aki (柏木愛生) (5th Gen; Joined April 2016, left unknown)
 * Aizawa Manae (會澤愛永) (3rd Gen; graduated May 2016)
 * Seiten Shiho (青天志穂) (1st Gen; left August 2016)
 * Suto Mahiro (須藤茉央) (2nd Gen; left September 2016)
 * Nakagawa Yuuri (仲川優莉) (2nd Gen; left December 2016?)
 * Shirasaki Ramu (白崎咲夢) (Joined December 2016?, left unknown)

Singles

 * [2015.06.03] Muteki Girl / Tomodachi de Iyou yo (無敵Girl /友達でいようよ)
 * [2016.01.08] EYES