Poster asking for citizens to report suspicious activity by Aum Shinrikyo.

Aum Shinrikyo (Oumu Shinrikyō, literally 'Supreme Truth'), is a Japanese new religious movement and doomsday cult founded by Shoko Asahara in 1987. It carried out the deadly Tokyo subway sarin attack in 1995 and was found to have been responsible for the Matsumoto sarin attack the previous year.