防災速報 - 地震、津波、豪雨など、災害情報をいち早くお届け

Yahoo! JAPAN (LY Corporation)

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About this app

○ A free disaster prevention app that notifies your current location and up to three designated locations within Japan.

○ Supports various weather and disaster information, including evacuation information, earthquake information, heavy rain forecasts, and national protection information (J-Alert).

○ Allows users to share disaster situations with each other via a disaster map.

○ The disaster prevention handbook contains a wide range of information useful for everyday preparations and when you're in trouble during a disaster.

【Features of Yahoo! Disaster Prevention Alerts】

・Provides prompt push notifications for various disaster information, including earthquake early warnings and heavy rain forecasts.

・Notifications can be sent to your current location and up to three designated locations within Japan. Peace of mind while traveling or on the go.

・On the app screen, you can check the latest disaster information for your current location and registered regions, as well as evacuation locations for each type of disaster.

・"Heavy Rain Forecasts" provide push notifications before heavy rain falls. Recommended for everyday use, such as for dealing with sudden downpours.

・The "Disaster Map" allows users to share disaster situations and see what kind of disaster is approaching and how far away it is.

The "Disaster Preparedness Handbook" can be used not only during a disaster but also for everyday preparedness, such as checking evacuation locations, hazard maps, and disaster supplies.

[Examples of App Usage]

* Preparing for Earthquakes and Tsunamis While Traveling: By enabling location-based notifications, you can receive earthquake early warnings for your travel destination without changing any settings.
You will also be notified if a tsunami advisory or warning is issued, allowing you to take evacuation action quickly.
*Earthquake early warnings may not be delivered in time if you are close to the epicenter.

* Preparing for Sudden Rain: You can quickly learn about heavy rain forecasts, allowing you to take precautions such as closing shutters at home or moving indoors when going out.

* Disaster Preparedness for Family Members Living Far Away: By setting your local area, you can receive disaster information notifications at your workplace, allowing you to inform your family to prepare for disasters.

[Supported Disaster Information]

■ Evacuation Information: You will be notified when local governments issue or cancel evacuation information.

■Earthquake Early Warning/Earthquake Information
Notifications are sent when the predicted seismic intensity of an earthquake early warning or the observed earthquake intensity exceeds the set value.

■Tsunami Forecast
Notifications are sent when a major tsunami warning, tsunami warning, or advisory is issued or lifted.

■Heavy Rain Forecast
Notifications are sent when precipitation is forecast to exceed the set value. You can also check the rain cloud situation using the rain cloud radar.

■River Flooding
Notifications are sent when a river flooding warning issued by the Japan Meteorological Agency is issued or lifted.

■Weather Warnings
Notifications are sent when a weather warning issued by the Japan Meteorological Agency is issued or lifted.

■Heatstroke Information
Notifications are sent along with the heat index and the level of danger when the heat index exceeds the set value.

■Volcano Information
Notifications are sent when an eruption bulletin or eruption warning is issued for a volcano affecting the set area.

■National Protection Information (J-Alert: Nationwide Instant Warning System)
Notifications are sent when an armed attack or large-scale terrorist attack from outside is imminent or has occurred.

■Crime Prevention Information
We will notify residents in the relevant areas of crime occurrence information and crime prevention warnings for the prefectures covered.

■Disaster Prevention Information from Local Governments
We will notify residents in the relevant areas of disaster prevention information announced by the local governments covered.

■Announcements and Training Information
We will notify you of announcements and training information from disaster prevention alerts.

■Please use this application after reviewing the LINE Yahoo! Terms of Service.

・LINE Yahoo! Common Terms of Service https://www.lycorp.co.jp/ja/company/terms/
・LINE Yahoo! Privacy Policy https://www.lycorp.co.jp/ja/company/privacypolicy/
・LINE Yahoo! Privacy Center https://privacy.lycorp.co.jp/ja/
・Software Rules (Guidelines)
https://www.lycorp.co.jp/ja/company/terms/#anc2

Ratings and reviews

It used to have the option to change the language of the information into English. Now it can't. why did the option disappeared?

Emergency app of no use. Can only be used in Japanese. No option to switch to another language. The same with the other Yahoo apps. Pretty bad show seeing as other apps can switch to the OS language automatically.

Good app! Easy to understand pictures and not wordy Japanese. Long hold quickly and easily copy/paste into translator if needed.

What’s new

2026/07/23［ver3.25.6］

・機能改善を行いました。

皆さまの安全のための情報をお届けできるよう引き続き改善いたします。
今後とも、Yahoo!防災速報をよろしくお願いいたします。