2019 Happenings
- 7 left groups
- 1 disbanded groups
- 1 retirements
- 5 graduations
- 2 ex-leaders
March 2019
- 11 Yanagawa Nanami leaves Hello! Project
June 2019
- 17 Miyazaki Yuka leaves Hello! Project
- 17 Miyazaki Yuka leaves Juice=Juice
- 17 Miyazaki Yuka steps down as leader of Juice=Juice
- 18 Wada Ayaka steps down as leader of ANGERME
- 18 Wada Ayaka leaves ANGERME
- 18 Wada Ayaka leaves Hello! Project
September 2019
- 25 Katsuta Rina leaves ANGERME
- 25 Katsuta Rina leaves Hello! Project
December 2019
- 10 Nakanishi Kana leaves ANGERME
- 10 Nakanishi Kana leaves Hello! Project
- 26 Ozeki Mai leaves Country Girls
- 26 Morito Chisaki leaves Country Girls
- 26 Yamaki Risa leaves Country Girls
- 26 Country Girls disbands
- 26 Yamaki Risa retires from show business