ChamJam

ChamJam is a minor underground idol group active in Okayama Prefecture that appears in Oshi ga Budokan Ittekuretara Shinu manga by Auri Hirao, as well as the anime adaptation. .

Members

 * Maina Ichii
 * Reo Igarashi
 * Sorane Matsuyama
 * Maki Hakata
 * Yumeri Mizumori
 * Yuuka Teramoto
 * Aya Yokota

History
ChamJam was put together by their management company with each girl joining as a trainee. First Reo, Maki and Yumeri, then Sorane, then Aya and Yuuka and finally Maina joining, completing the line-up.

They soon debuted and held their first performance which was extremely small with the audience only consisting of a handful of fans. Disappointed by the small turnout they set themselves the target to make it to the Budokan.

The group regularly holds concerts and handshake events at the MKCandy studio. They also promote their group by holding outside performances at different venues and handing out fliers to the public.

Having a member ranking system the more popular members make it to the front row which gives them more visibility as well as being more likely to be picked for events, such as the Girls Festa event where the initial front row members Reo, Sorane, and Maki (along with Maina) were picked to model. And Reo being chosen to act for a local drama channel on TV and Maki getting the chance to appear on TV and report on the 16th Setouchi Idol Festival.