Assassination of Inejirō Asanuma
On 12 October 1960, Inejirō Asanuma (浅沼 稲次郎, Asanuma Inejirō), chairman of the Japan Socialist Party, was assassinated at Hibiya Public Hall in Tokyo. During a televised debate, 17-year-old ultranationalist Otoya Yamaguchi charged onto the stage and fatally stabbed Asanuma with a wakizashi, a type of traditional short sword.
Source: Wikipedia — Assassination of Inejirō Asanuma (CC BY-SA 4.0)