Sekaisen

 is a Japanese idol group formed in September 2021 as a seven-member group. They made their live debut on September 25, 2021 at SHIBUYA DIVE, Tokyo.

Current Members

 * Tsukino Sakura (月野咲良) (Founding member)
 * Toba Kanako (鳥羽かなこ) (Founding member)
 * Miyazaki Noa (宮崎乃綾) (Founding member)
 * Takase Reona (高瀬麗央苗) (Joined March 25, 2023)

Former Members

 * Takanashi Amu (小鳥遊あむ) (Founding member; Withdrew February 2, 2022)
 * Momose Myu (桃瀬みゅう) (Founding member; Graduated October 8, 2022)
 * Asahi Rika (朝日りか) (Founding member; Graduated February 4, 2023)
 * Ui Amika (羽衣雅美香) (Founding member; Graduated February 4, 2023)

Singles

 * [2021.09.22] Hello

Trivia

 * The group inherited the songs of IVOLVE and includes former IVOLVE member NOA.