Aiiro Asterism

Aiiro Asterism (藍色アステリズム) is currently a five-member Japanese idol group originally formed with seven members in March 2018.

They made their stage debut on June 4, 2018 @Toyosu PIT.

They went inactive on December 30, 2019, where the remaining members graduated.

They revived the group on March 5, 2020, with five new members.

The new line-up debuted on March 9, 2020 @Shinjuku KeyStudio.

Current members

 * Otonashi Nori (音無のり; ) (Joined March 5, 2020)
 * Haruta Ayaka (春田彩花; ) (Joined March 5, 2020)
 * Izumi Mafuyu (泉まふゆ; ) (Joined October 11, 2020)
 * Hosoya Kana (細谷要凪; ) (Joined May 27, 2021)
 * Minazuki Yuyu (水無月ゆゆ; ) (Joined September 14, 2023)

Former Members

 * Miyama Rin (深山凜) (Founding Member; Graduated on October 25, 2018)
 * Satou Mei (佐藤芽衣) (Founding Member; Graduated on May 28, 2019)
 * Nishitani Iori (西谷依織) (Founding Member; Graduated on December 30, 2019)
 * Kurata Moka (倉田もか) (Founding Member; Graduated on December 30, 2019)
 * Sakuragi Kasumi (桜木花純) (Founding Member; Graduated on December 30, 2019)
 * Hoshino Aya (星野彩) (Founding Member; Graduated on December 30, 2019)
 * Watanabe Mio (渡辺美碧) (Founding Member; Graduated on December 30, 2019)
 * Shirone Moeka (白音もえか; ) (Joined on October 11, 2020; Withdrew on November 13, 2020)
 * Shirosaki Himari (城崎ひまり; ) (Joined on March 5, 2020; Graduated on September 22, 2022; Leader)
 * Takanashi Mao (高梨真緒; ) (Joined on March 5, 2020; Graduated on September 22, 2022)
 * Aino Kotoe (愛野琴都恵; ) (Joined March 5, 2020; Graduated April 23, 2023)