Japan Alerts

Japan Alerts delivers real-time earthquake, tsunami, volcano, typhoon, and all kinds of evacuation alerts from the Japan Meteorological Agency (JMA), translated into 10 languages.

WHO IS THIS APP FOR?

• Residents and expats who need alerts in their own language

• Travelers — add your destinations (up to 6 in Premium) and arrive prepared

• Anyone with family or a loved one in Japan

• Families who want a shared earthquake safety plan

• Anyone fascinated by Japanese seismology and volcanology

REAL-TIME ALERTS

• Earthquake alerts with Shindo intensity and magnitude

• S-wave countdown on emergency alerts: how many seconds before the shaking reaches you

• Tsunami warnings with expected wave height and affected coastline

• Municipality-level evacuation orders for every hazard — floods, landslides, storm surge and more — by warning level, in plain language

• Volcanic eruption bulletins, typhoon tracking and severe-weather alerts

10 LANGUAGES

Not just the app: alerts and place names are translated — nothing vital stays in Japanese only. Note: shelter names, addresses and place names are provided in English and/or romaji, not in the app language. Available in English, Japanese, French, Chinese, Korean, German, Spanish, Italian, Portuguese, and Russian.

FREE — THE SAFETY ESSENTIALS

• Alerts for moderate quakes (Shindo 4+) near you, and strong quakes (Shindo 6-) anywhere in Japan

• 98,000+ official evacuation shelters with names and addresses in English/romaji, plus walking directions and offline access

• Interactive map: epicenters, affected areas, and shelters (earthquake, tsunami, flood, fire)

• A family safety group, "I'm safe" check-in, and a shared map

• 100 years of seismic history in an animated time-lapse, plus statistics

• Distinct, customizable alert sounds and a quiet night mode

PREMIUM — GO DEEPER

• Watch up to 7 places at once: your home plus 6 custom zones anywhere in Japan

• Set your own Shindo threshold per zone — be alerted before it gets serious

• Hazard maps across all 47 prefectures: flood, tsunami, landslide, liquefaction, volcanic and more (free: your home prefecture, one hazard type only)

• No ads

• Traveling to Osaka next month? Add it as a zone before you go.

INTERACTIVE MAP & SHELTERS

• Epicenters, affected areas, hazard layers and volcanoes at a glance

• Filter shelters by type: earthquake, tsunami, flood, fire

• Check in at a shelter and see real-time occupancy from other users

STAY PREPARED

• One-tap access to emergency services (110 police, 119 fire, 118 coast guard)

• Post-quake analysis for M6+ events: your distance to the epicenter, S-wave travel time, energy released

• Detailed preparedness guidance by hazard type

ABOUT JMA

The Japan Meteorological Agency operates over 4,000 seismic stations and monitors all 111 active volcanoes in Japan. This app uses JMA public data but is not affiliated with JMA or the Japanese government. It is not a substitute for J-Alert or any official warning system — in an emergency, always follow your local authorities.

Free with ads. Premium unlocks custom watch zones, per-zone thresholds, and nationwide hazard maps, and removes all ads. Safety shouldn't be a luxury — Premium is priced to stay accessible to everyone.

SUBSCRIPTION INFORMATION

Japan Alerts offers an optional auto-renewable subscription.

• Subscription automatically renews unless cancelled at least 24 hours before the end of the current period.

• Payment will be charged to your Apple ID account at confirmation of purchase.

• Your account will be charged for renewal within 24 hours prior to the end of the current period.

Privacy Policy:

https://www.index64.com/japan-alerts/privacy-policy/

Terms of Use (EULA):

https://www.apple.com/legal/internet-services/itunes/dev/stdeula/