In the wake of high-profile sexual harassment cases involving a top Finance Ministry bureaucrat and a mayor in west Tokyo, a website was launched last week to allow victims of harassment to send anonymous warnings to the perpetrators.

Named Sorehara, the Japanese short form for "that's harassment," the service delivers warnings such as "there have been reports that you have harassed someone."

The warnings continue with a gentle nudge urging the recipient to reflect on their past behavior by saying it is sometimes "hard to notice the consequence of your own actions. Does this notice ring any bells?"