was a Japanese terrorist and Aum Shinrikyo member who was executed for his participation in the 1995 Tokyo subway sarin attack and a number of other crimes.
He produced the Sarin gas for the attack after leader Shoko Asahara told him to do so.
Endo was a native of Sapporo, Hokkaido; he graduated from a veterinary school. He later studied virus and genetic engineering at Kyoto University graduate school.