January 14, 1956 - Masakatsu Nishikawa
His first conviction came nearly two decades before the killings that would define his legacy, making him a rare case of a documented prior murderer who went on to commit a coordinated series of crimes against women in the hospitality trade. The attacks across three prefectures in a single year suggest methodical movement rather than opportunism. He was executed in 2017, the judicial process ultimately closing a record that spanned more than forty years of violent crime.
From Wikipedia
Masakatsu Nishikawa (西川正勝, Nishikawa Masakatsu; January 14, 1956 – July 13, 2017) was a Japanese serial killer who killed four snack bar hostesses and attempted to kill two others from 1991 to 1992 in three prefectures. An ex-criminal with a murder conviction from 1974, he was convicted of his latter crimes, sentenced to death and executed in 2017.
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