ASTROMATE

 was a space-themed idol group formed on February 6, 2018. They disbanded on June 13, 2020.

Final Line-up

 * Honda Natsumi (本田夏実; ) (Original member)
 * Yuikawa Mahiro (結川まひろ; ) (Original member)
 * Mochizuki Saaya (望月さあや; ) (Original member)
 * Sato Hanna (佐藤はんな; ) (Joined August 2019)
 * Hayasaki Yuri (​早崎友理; ) (Original member)

Former Members

 * Takahashi Maria (​高橋真利亜) (Original member; Graduated May 2018)
 * Kirishima Anzu (​桐島杏) (Original member; Left August 2018)
 * Yuzuki Nene (​柚木音々) (Original member; Graduated June 2019)
 * Takanashi Kiriko (小鳥遊桐恋; ) (Joined August 2019; Graduated February 2020)

Trivia

 * The group's fans are called STARGAZER, and their shows are referred to as PLANETARIUM.

Singles

 * [2018.04.25] ASTRO
 * [2019.02.03] Brilliant World