Tetsuya Yamagami, 45, who shot dead Japan’s longest-serving prime minister Shinzo Abe with a homemade gun at a campaign rally in 2022, was sentenced to life imprisonment on Wednesday. Tetsuya Yamagami, 45, who shot dead Japan’s longest-serving prime minister Shinzo Abe with a homemade gun at a campaign rally in 2022, was sentenced to life imprisonment on Wednesday.