Abe’s own grandfather, Prime Minister Nobusuke Kishi, was stabbed in the thigh in 1960 and severely injured during a reception at the Prime Minister’s Office. That same year, Inejiro Asanuma, then head of the Japan Socialist Party, was fatally stabbed by a 17-year-old rightist while making a speech at a public hall in Hibiya, Tokyo. In the years that followed, Prime Minister Takeo Miki, Deputy Prime Minister Shin Kanemaru and Prime Minister Morihiro Hokosawa were either attacked or shot in 1975, 1992 and 1994, respectively. They all survived the attacks. Local-level politicians have also been attacked. In 1990 — two...