Aum Shinrikyo incidents
Refers to the series of crimes committed by the Aum Shinrikyo cult, most notably the 1995 Tokyo subway sarin attack. Used as a historical term.
The Aum Shinrikyo incidents are one of the largest terrorist events in postwar Japan.
He wrote a book about the Aum Shinrikyo incidents.
Compound of オウム真理教 (Aum Shinrikyo, the cult's name) and 事件 (incident, affair).