Shonen Ninja.

Shonen Ninja (少年忍者) is best described as a 21-member pre-debut Johnny’s Jr unit.That consist of Kawasaki Koki, Hiratsuka Shoma, Motoki Waku, Aoki Kohei, Fukada Ryusei, Ajima Hideki, Uchimura Sota,Vasayegh Wataru, Nagase Yusei, Hiyama Kosei, Oriyama Nao, Kuroda Koki, Kitagawa Takumi, Taki Yojiro, Suzuki Yujin, Yamai Tsubase, Kawasaki Hoshiki, Kubo Ren, Inabo Michiaru, Tamura Kairu and Oda Shosei. Another profile detail is that they were introduced for the first time on June 9, 2018, with 14 members. Additional background says that on September 19, they added 5 more members who were introduced as the “5 Ninja.” At one point, the group had 25 members, but Raul was later moved to Snowman. Additionally, 4 members departed the group, though one is still training at the company.They were originally under Johnny’s Entertainment, but due to the sexual abuse case involving Johnny, they were moved to a new company, Starto Entertainment. Another profile detail is that Shounen Ninja’s Island TV character is named Nikoniko (忍魂忍魂). Additional background says that The group’s nickname is “Shonin” or “Ninnin.” Initially, they were divided into three sub-units based on the number of members in each unit: 5nin, 7nin, and 9nin. The profile also notes that Later, the units were shuffled and are now organized as 7nin, 6nin, and 8nin. Another profile detail is that Additionally, they have unofficial/fan-termed sub-units: 3105, Little King, and Shonin Band.