Jukujoclub Rei Kitajima Transformation Mot 2021 Link

Another angle: Sometimes, in Japanese entertainment, events have specific names like "Jukujoclub Rei Kitajima Transformation MOT 2021" which could be a special performance under the MOT (Music Oriented Theater) series. The transformation could be a themed performance for her 20th anniversary (2021 being significant if she started in the 2000s). But since she was born in 1993 and debuted around 2011 with Hello! Project (but as a second-year Hi!5 member?), so 2021 would be her 10th anniversary maybe? Or could be a different milestone. Alternatively, MOT is an annual event where artists perform, and 2021's edition featured Rei in a transformative role.