It happend on 20 March 1995, during rush hour. It killed 13 people, severely injuring 50 (some of whom later died) and causing temporary vision problems for nearly 1,000 others. Its leader, whose name I’m not gonna mention (you can read it if you want), was executed on July 6, 2018 by hanging.
I highly recommend Haruki Murakami’s “Underground”, which is a non-fiction work where he compiles stories from the survivors and those who responded.
I remember it happening and learning about it, but I didn’t fully understand Aum or japans culture.