Answer
Shoko Asahara, leader of the Japanese doomsday cult Aum Shinrikyo, was convicted of the deadly sarin gas attack perpetrated on the Tokyo subway system in 1995. This heinous act of domestic terrorism claimed the lives of 13 people and caused severe injuries to thousands more, leaving a lasting impact on Japan's society and psyche. Asahara's conviction for this crime solidified his role as the mastermind behind the cult's dangerous activities.