So didn't Hinata members become adults too? Keyaki 2ki are almost mainly adult members and they are funny as hell. This was the plan of Konno and AkiP how they based on their choices from Sakamichi Joint Audition. Pick adult members who can enter and understand Keyaki's color that 1ki have built and won't get ruined. This was the reason why they didn't assigned mainly young members this time have they said. There are kss who could have taken their place but Konno and AkiP were strategists and thought of the group's future. Hono, Rikopi, Seki, Matsuri are in the same age as 1ki. 2ki are building a foundation for next potential variety members to enter the group. Matsuri and Takeyui showed in this episode they are Kumi and Katoshi in Keyaki version.