81moment

 (エイトワンモーメント; read as Eight One Moment) is currently a four-member Japanese idol group formed in August 2015.

Current Members

 * Onzai Nia (音済にあ; ) (Joined December 2020, graduating August 1, 2023)
 * Mashiro Kanata (愛白かなた; ) (Joined June 22, 2021)
 * Aone Kureha (藍音くれは; ) (Joined January 4, 2023)
 * Amagami Mikuru (天神みくる; ) - Support member (Joined April 3, 2023)

Former Members

 * Noda Erina (野田えりな) (Joined August 2015, graduated February 2016)
 * Shimizu Riko (清水理子) (Original Member, graduated April 2016)
 * Ayase Ai (綾瀬愛) (Original Member, Graduated June 2016)
 * Igarashi Mau (五十嵐茉優) (Original Member, graduated July 2016)
 * Harasawa Mao (原澤稀音) (Joined Unknown, graduated December 2016)
 * Haruno Emiri (春野絵実莉) (Original Member, graduated May 2017)
 * Shiina Narumi (椎名成美) (Original Member, graduated August 2017)
 * Amatsuka Milky (天使みるきぃ) (Joined August 2016, graduated September 2017)
 * Sakurai Nanamo (櫻井ななも) (Joined August 2017, left March 2018)
 * Shirayuki Kotori (白雪ことり) (Joined August 2017, left March 2018)
 * Shinonome Reika (東雲れいか) (Joined August 2016, graduated August 2018)
 * Minagawa Yuuka (皆川優香) (Joined June 2018, graduated November 2018)
 * Tennouji Haru (天王寺ハル) (Joined February 2017, graduated February 2019)
 * Kamiya Jurina (神谷じゅりな) (Joined November 2018, graduated May 2019)
 * Hidaka Fumika (日高ふみ夏) (Joined April 2019, left May 2019)
 * Tachibana Karen (立花かれん) (Joined July 2019, left July 2019)
 * Aratani Moa (新谷もあ) (Joined April 2019, graduated October 2019)
 * Nakamoto Seina (中本星七) (Joined November 2018, graduated April 2020)
 * Natsume Risa (夏目りさ) (Joined July 2019, graduated June 2020)
 * Kanade Rio (奏りお) (Joined August 2019, graduated June 2020)
 * Momose Mai (百瀬まい) (Joined June 2020, left August 2020)
 * Hinata Hinano (ひなたひなの) (Joined June 2020, left August 2020)
 * Murasaki Futaba (村咲ふたば) (Joined August 2017, graduated August 1, 2021)
 * Aizawa Hina (相沢ひな) (Joined June 23, 2021, left November 2021)
 * Mochimiya Riyo (餅宮りよ) (Joined June 2020, graduated December 2021)
 * Takanashi Ayaka (小鳥遊彩花; ) (Joined June 2020, graduated December 15, 2022)
 * Tsukishima Sui (月島彗; ) (Joined November 2021, graduated March 27, 2023)
 * Sato Chino (さとうちの; ) (Joined November 2021, graduated June 29, 2023)

Singles

 * [2017.05.16] UTAGEI / Kiseki wa Sude ni Umareteru (UTAGEI／奇跡はすでに生まれてる)

Digital Singles

 * [2021.01.30] Shine
 * [2021.02.12] Trigger
 * [2021.03.01] Kimi ni Countdown
 * [2021.03.28] SAKURACHIRU
 * [2022.01.01] Take me to the Top