Recently, the alma mater of Kuroko no Basket's manga creator, Tadotoshi Fujimaki and other locations linked to the author were sent threat letters with powders and other dangerous substances earlier this month.
According to the police, the Toyama High School in Tokyo's Shibuya ward recieved a threat letter with the powder on Tuesday. Sophia University recieved a hydrogen sulfide-like liquid and a letter last Friday.
Both school were Fujimaki's alma mater.
In addition, a publisher in Tokyo's Suginami ward recieved powdered barium and a threat letter on Saturday. The letter warned about Kuroko no Basket, saying, "If you do not stop the pardoy manga, you will get hydrogen sulfide." and other similar threats.
Metropolitan Police Department are currently investigating the association.
