Masato Yokoyama



Age: 55


Summary: Japanese convicted murderer and a former deputy chief of Aum Shinrikyo doomsday-cult group's so-called science and technology unit who was sentenced to death by the Tokyo District Court in September 1999 for playing a direct role in the deadly 1995 sarin nerve gas attack in the Tokyo subway system, which killed 13 people and injured thousands of other passengers, who also played a role in a plan to manufacture around 1,000 firearms between 1994 and 1995 under the orders of Aum founder Shoko Asahara and was among the five cultists who released the nerve gas on subway trains.



Cause of Death: Executed by lethal injection


Born: May 16, 1963


Died: July 26, 2018


Location: Nagoya, Japan