Kaizensei Altruism (蓋然性オルトイズム) is currently a two-member idol group formed on December 26, 2020 by ONEtoONE Agency and includes former members of TEARS.[1]
They made their stage debut on February 1, 2021 @Shinjuku ReNY.
It was announced that the current structure would end on February 9, 2025.
Members[]
Current Members[]
- Hoshina Misaki (星奈実沙希; Light Blue) (Joined November 7, 2021)
- Ran Honoka (蘭ほのか; Lavender) (Joined April 24, 2022)[2]
Former Members[]
- Nagatsuki Yuuki (長月優希; Red) (Founding member; Withdrew May 26, 2021)
- Asahina Nana (朝比奈なな; Sky Blue) (Founding member; Graduated June 20, 2021)
- Shiraishi Neon (白石ねおん; Yellow) (Founding member; Graduated June 20, 2021)
- Tachibana Ui (立花憂衣; Purple) (Founding member; Transferred to Re:INCARNATION October 4, 2021)
- Kawashima Arisu (河島有寿; Mint Green) (Founding member; Withdrew March 4, 2022)
- Aikawa Mana (藍川まな; Yellow) (Joined July 23, 2021; Transferred to trainee unit March 16, 2022)[3]
- Futaba Yui (二葉唯; Green) (Joined July 23, 2021; Transferred to trainee unit March 16, 2022)[3]
- Tsuji Kaho (辻海帆; Black) (Founding member; Transferred to TEARS March 19, 2022)[4]
- Kanzaki Serina (神崎せりな; White) (Joined March 20, 2021; Inactive since August 2022; Left unknown)[5]
- Minami Shion (美波紫音; Dark Pink) (Joined March 26, 2022; Inactive since August 2022; Left unknown)[6]
- Kururugi Maho (枢木まほ; Blue) (Founding member; Graduated December 31, 2022)[7]
- Shirakawa Rena (白川れな; Dark Pink) (Joined January 30, 2023; Left unknown)
- Shirohane Chihiro (城羽千姫; Shining Blue) (Joined April 21, 2024; Withdrew August 24, 2024)
- Makise Yumi (牧瀬裕美; Coral Pink) (Founding member; Graduated February 9, 2025)
- Mizuue Saki (水上咲; Orange) (Founding member; Graduated February 9, 2025)
- Kita Conatsu (北こなつ; Silver) (Joined March 20, 2021; Graduated February 9, 2025)[5][8]
- Hiyori Yuu (日和ゆう; Purple) (Joined March 26, 2022; Graduated February 9, 2025)[6]
- Sakuraba Nana (桜羽なな; Red) (Joined April 24, 2022; Graduated February 9, 2025)[2]
- Aoi Nano (葵菜乃; Nanoha Yellow) (Joined July 3, 2022; Graduated February 9, 2025)[9]
- Mashiro Hina (真白ひな; Black) (Joined April 21, 2024; Graduated February 9, 2025)
Timeline[]

Note: Dark Grey - Member Inactive / on Hiatus
Discography[]
Singles[]
- [2022.06.15] emperor
Digital Singles[]
- [2023.08.16] LAST LOVE
- [2023.08.23] Eien Memories (永遠 Memories)
- [2023.08.30] Kindan Lover (禁断Lover)
- [2023.09.06] Kuusou Believe (空想Believe)
- [2023.09.13] Hana Kotoba ~Kimi wo Wasurenai~ (花言葉〜君を忘れない〜)
- [2023.09.20] Hoshigarina Boku ni Kiss wo Shite (欲しがりな僕に kiss をして)
- [2023.09.27] Namida no Ryou Omoi (ナミダの両思い)
Gallery[]
External Links[]
References[]
- ↑ Group Formation
- ↑ 2.0 2.1 New Member Announcement (April 2022)
- ↑ 3.0 3.1 Idol Report 2022.03.16
- ↑ Idol Report 2022.03.09
- ↑ 5.0 5.1 New Member Announcement (March 2021)
- ↑ 6.0 6.1 New Member Announcement (March 2022)
- ↑ Kururugi Maho Graduation Announcement
- ↑ Kita Conatsu Hiatus Notice
- ↑ New Member Announcement (July 2022)