The Tokyo subway sarin attack occurred on March 20, 1995, when members of the cult group Aum Shinrikyo released the nerve agent sarin in the Tokyo subway system during the morning rush hour. This coordinated attack targeted five trains, resulting in the deaths of 13 people and injuring over 5,000 others. The incident shocked Japan and the world, highlighting the dangers of chemical weapons and domestic terrorism. In the aftermath, authorities arrested several members of Aum Shinrikyo, leading to a broader crackdown on the cult and increased security measures in public transportation systems.