J-Alert System (Zenkoku Shunji Keiho Shisutemu) is a nationwide warning system in Japan launched in February 2007. The system now covers 100% of the municipalities nationwide. It is designed to quickly inform the public of various threats including:
- Earthquake
- Tsunami
- Volcano Eruption
- Severe Weather
- Special Emergency Threats
- Ballistic Missiles
- Airstrikes
- Terrorism