The police reported that the suspect wrote to Mizuki’s Twitter account on February 2, “I’ve got no choice but to kill Nana Mizuki,” and other messages.
Another male part-time worker was arrested in 2008 for posting on the 2ch online message board that he would kill Mizuki and her fans.
Mizuki’s representatives filed a complaint with the Tokyo Metropolitan Police in Akasaka on the same day they received the alleged threats.
The police are charging him with interfering with the business activities of Mizuki’s fan club management.