PiiiiiiiN

 was an idol group originally formed in December 2013. They disbanded on May 5, 2017, and reformed on May 26, 2018 with a new line-up. They disbanded again after a solo live on August 8, 2020.

They were a sister group of PPP! PiXiON.

Final Line-Up

 * Ueno Rimi (上野りみ) (Joined May 2018)
 * Nasu Hohomi (那須笑美) (Joined July 2018)
 * Maeda Eve (前田イブ) (Joined July 2018)
 * Miki Asuka (美希あすか) (Joined May 2018)
 * Otsuki Riko (大槻りこ) (Joined August 2019)
 * Horiguchi Aika (堀口あいか) (Joined August 2019)
 * Tanaka Miu (田中みう) (Joined January 2020)

Former Members

 * Hoshino Nina (星野にな) (Original Member, Left January 2015)
 * Hara Ayano (原あやの) (Original Member, Graduated September 2016)
 * Suga Emiri (菅えみり) (Original Member, Graduated May 2017)
 * Saito Runa (斎藤るな) (Original Member, Graduated May 2017)
 * Kubomura Rizu (久保村りず) (Original Member, Graduated May 2017)
 * Shitamitsu Riko (下光りこ) (Joined April 2014, Graduated May 2017)
 * Jinno Ami (神能あみ) (Joined April 2014, Graduated May 2017)
 * Tsubone Arisa (坪根ありさ) (Joined January 2015, Graduated May 2017)
 * Iwabuchi Hina (岩渕ひな) (Joined May 2018, Left May 2019)
 * Haraguchi Minami (原口みなみ) (Joined May 2018, Left May 2019)
 * Nakao Miki (中尾みき) (Joined May 2018, Left May 2019)
 * Wakou Rion (若生りおん) (Joined August 2019, Left September 2019)

Albums

 * 1) [2015.07.04] Aiaru♡Seishun☆ROCK YOU (愛ある♡青春ROCK☆YOU)
 * 2) [2016.10.25] Youshanaku Nigetetta Mirai (容赦なく逃げてった未来)

Singles

 * 1) [2016.07.19] Shiny days
 * 2) [2019.03.12] Jumping / Kokuban no Melody (Jumping/黒板のメロディー)