Bunka Housou/Nippon Cultural Broadcasting, a Japanese radio station in Tokyo, has been airing a radio show called "Kuroko's Basketball Broadcasting Committee" featuring the anime voice actors Kensho Ono (Tetsuya Kuroko) and Yuuki Ono (Taiga Kagami) since April 2012.
A package that the staff of the program received on October 29th contained a threat letter and a vessel with a liquid substance. The letter included a slur on the creator of the manga Tadatoshi Fujimaki and said, "If you don't stop airing the show, I will harm you." According to the Metropolitan Police Department, 10 places related to the manga and the creator have received threat letters with powder or liquid substances in this two weeks. The police believes that these letters were sent by the same person and is investigating the case on suspicion of forcible obstruction of business.
Source: MSN Sankei
image © Tadatoshi Fujimaki/Shueisha/Kuroko's Basketball Production Committee