August 21, 1983 - Yukio Yamaji
What distinguishes his case in the record of Japanese violent crime is the pattern it describes: a killing within the family, a period of incarceration, release, and then further violence before his execution at twenty-five. The brevity of his life contained a concentrated sequence of harm that raised questions about the adequacy of the parole determination that preceded it.
From Wikipedia
Yukio Yamaji (山地 悠紀夫, Yamaji Yukio; August 21, 1983 – July 28, 2009) was a Japanese serial killer convicted of the Yamaguchi matricide case and the Osaka sisters murder case.
In 2000, Yamaji killed his mother during an argument. As he was a juvenile offender, youth detention was imposed, leading to Yamaji's release after two years. The case was high profile amidst a spade of other violent crimes perpetrated by teenagers in Japan.
In 2005, Yamaji raped and murdered sisters Asuka and Chihiro Uehara in a home invasion, setting fire to their apartment to destroy evidence. Due to the brutality of the crime and Yamaji's prior criminal record, there were renewed debates about the effectiveness of juvenile law.
Yamaji was sentenced to death in 2006 and executed in 2009.
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