Lin Tainan (Japanese: Lin Tainan/はやしやすお Hayashi Yasuo; December 15, 1957 – July 26, 2018) was a Japanese convicted murderer, terrorist and former member of the doomsday cult Aum Shinrikyo. He is of Korean descent, and changed his name to Koike Yasuo after taking his wife's surname. He was a former senior cadre of Aum Shinrikyo (Master Zhengwu, deputy minister of the Ministry of Science and Technology).
Source: “Lin Tainan”, English Wikipedia (CC BY-SA 4.0), excerpt