22/7

22/7, read as "Nanabun no Nijuuni," is a Japanese idol group formed on October 17, 2016, and produced by Yasushi Akimoto. The group works in J-pop under Sony Music Records and has contributed ending themes to anime such as A Couple of Cuckoos Season 2, Even Given the Worthless "Appraiser" Class, I'm Actually the Strongest, and The Beginning After the End Season 2. The current lineup includes Sally Amaki (天城 サリー), Uta Kawase (河瀬詩), Nao Aikawa (相川奈央) (Joined on March 2022), Mao Asaoka (麻丘真央) (Joined on March 2022), Satsuki Shiina (椎名桜月) (Joined on March 2022), Luna Shijou (四条月) (Joined on March 2022), Emma Tsukishiro (月城咲舞) (Joined on March 2022), and Rino Mochizuki (望月りの) (Joined on March 2022). Former members include Mei Hanakawa (花川 芽衣) - December 2019; Chiharu Hokaze (帆風 千春) - February 2021; Urara Takatsuji (高辻 麗) - October, 2021, later renamed Urara Hinaga (日永麗); Ruri Umino (海乃 るり) - November, 2021, later renamed Ruri Yoshimiya (吉宮瑠織); Mizuha Kuraoka (倉岡 水巴) - November 2021, later renamed Riko Kuramaru (倉丸莉子); Aina Takeda (武田 愛奈), who was on hiatus from December 2020 to April 2021 and left in December 2021; Reina Miyase (宮瀬 玲奈), later renamed Ui Sakura (佐倉初), who left in May 2023; Kanae Shirosawa (白沢 かなえ), who left in July 2023; Oto Amaya (雨夜音) (Joined on March 2022), who left in August 2023 due to study and her mother's health; Mina Kiyoi (清井美那) (Joined on March 2022), who left in November 2023 due to poor health; Moe Suzuhana (涼花 萌), who left at the end of August 2024; and Nagomi Saijou (西條 和), who left at the end of August 2025.