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JO1 (Japanese: ジェイオーワン, Hepburn: Jeiōwan) is a Japanese boy band formed through the first season of Produce 101 Japan by Lapone Entertainment, a joint venture between Yoshimoto Kogyo and CJ ENM. The group is composed of eleven members: Issei Mamehara, Ren Kawashiri, Takumi Kawanishi, Shosei Ohira, S