Namie Joshihatsu Kumia.

LumiUnion (ルミユニオン), formerly known as Namie Joshihatsu Kumiai (浪江女子発組), is an eight-member Japanese girl group managed by STAR PLANET (Stardust Promotion) and King Records. The lineup includes Ayaka Sasaki, Luna Naito, Kana Harima, Saho Tanaka, Mia Yuduki, Moana Chihama, Nanoha Aoyama, and Rina. Additional background says that they made their stage debut on November 24, 2019 at the Reconstruction of Namie Town Tokaichi Festival. The profile also notes that The group is based in Namie, Fukushima Prefecture, and was formed eight years after Namie was devastated by the 2011 Tōhoku earthquake and tsunami.