Assault of Maho Yamaguchi

On December 8, 2018, Maho Yamaguchi, then a member of the idol girl group NGT48, was assaulted by two male fans of the group inside of her apartment building. Details of the incident were not disclosed until January 8, 2019, when Yamaguchi personally did on social media, also explaining that her personal information was leaked to the men through other members of NGT48, and denouncing the group's management for inaction on the issue.

Source: Wikipedia — Assault of Maho Yamaguchi (CC BY-SA 4.0)