March 28, 1961 Nabari, Mie Prefecture, Japan Masaru Okunishi (奥西勝) kills his wife, mistress, and three others with poison The mass poisoning occurred during a March 28 meeting of the Livelihood Improvement Group; Okunishi was the chairman of the group. Investigators found the wine served at the meeting was laced with agrochemicals, and 17 women…