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Man Sentenced to Death for Killing 4 in Central Japan

Masanori Aoki was sentenced to death after stabbing two women and shooting two police officers, with the court rejecting his schizophrenia defense and citing full criminal responsibility.

  • On Oct 14 the Nagano District Court sentenced Masanori Aoki, 34, to death for killings in Nagano Prefecture in 2023 after prosecutors sought the penalty.
  • On May 25, 2023 Aoki fatally stabbed neighbours Yasuko Takeuchi, 70, and Yukie Murakami, 66, after believing they spoke ill of him in Nakano City, Nagano Prefecture.
  • Police officers Takuo Ikeuchi, 61, and Yoshiki Tamai, 46, were shot with a hunting rifle after arriving, and Aoki barricaded himself in his parents' home in Nakano city for 12 hours before surrendering.
  • The court rejected the defence's diminished-capacity argument, ruling Aoki fully responsible and presiding judge Masashi Sakata called the taking of four lives exceptionally cruel.
  • Shooting multiple officers is unusually rare in Japan, with the last such incident more than 30 years ago, prompting tighter Firearms and Swords Control Law rules on `half rifles`.
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The Japan Times broke the news in Japan on Tuesday, October 14, 2025.
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