防災速報 - 地震、津波、豪雨など、災害情報をいち早くお届け

4.4
34.9K reviews
5M+
Downloads
Content rating
Everyone
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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 Risk
Notifications are sent when the risk of landslides or river flooding due to heavy rain increases in the set area.

■Mid-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.

■Landslides
Notifications are sent when a landslide warning is issued or lifted.

■River Flooding
Notifications are sent when a designated river flood forecast ("Flood Warning" or higher) is issued or lifted.

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

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

■ Volcanic Information
Notifies you when an eruption alert or warning is issued for a volcano affecting your designated area.

■ National Protection Information (J-Alert: Nationwide Instant Warning System)
Notifies you when an armed attack or large-scale terrorist attack is imminent or has occurred.

■ Crime Prevention Information
Notifies residents in the relevant area of ​​crime occurrence information and crime prevention warnings for the corresponding prefecture.

■ Emergency Information from Local Governments
Notifies residents in the relevant area of ​​disaster prevention information announced by the corresponding local government.

■ Announcements and Training Information
Notifies 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
Updated on
Apr 17, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, Personal info and 3 others
This app may collect these data types
Location, Personal info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.4
33.2K reviews
Tainted Brain
May 27, 2023
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.
6 people found this review helpful
A Google user
October 11, 2019
Good app! Easy to understand pictures and not wordy Japanese. Long hold quickly and easily copy/paste into translator if needed.
25 people found this review helpful
Ryan Brossart
October 1, 2022
Very disappointing that that's no options for languages other than Japanese for this app. I will certainly rate much higher once this is available.
29 people found this review helpful

App support

About the developer
LY CORPORATION
yj-support@mail.yahoo.co.jp
1-3, KIOICHO TOKYO GARDEN TERRACE KIOICHO KIOI TOWER CHIYODA-KU, 東京都 102-0094 Japan
+81 3-6898-7880

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