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72
BU Score
Strong

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 ✍️ Editor
✍️ bumetric analysis

防災速報 - 地震、津波、豪雨など、災害情報をいち早くお届け is an Android app from Yahoo! JAPAN (LY Corporation) in the Weather category, currently rated 4.4★ across 34,944 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Our BU Score puts it at 72: Strong (healthy traction). For a Weather app, that means healthy traction.

Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 3 of 3 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Mid install base (34,944 ratings)METRIC
+$5,500
Good rating (4.4★)METRIC
+$800
Ad-supported / freemiumMETRIC
+$600
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
🔖 vVaries with device📂 Weather💰 Free

📝 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

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
防災速報 - 地震、津波、豪雨など、災害情報をいち早くお届け
Developer
Yahoo! JAPAN (LY Corporation)
Bundle ID
jp.co.yahoo.android.emg
App Store URL
Open in App Store
Category
Weather
Content rating
Not found
Languages
Not found

Company

Website
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Tagline
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Description
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Founded
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HQ / Address
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Employees
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Logo
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Revenue

Verified revenue / mo
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AI revenue estimate / mo
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AI annual estimate
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ML model estimate / mo
$1.8K/mo
Top-grossing rank
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All-time revenue
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Pricing
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Founder

Name
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X / Twitter
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LinkedIn
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GitHub
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Public statements
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Funding

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Last round
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Investors
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Crunchbase
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AngelList
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Press & Links

Articles found
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Listed on
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Blog
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Press / News
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Contacts & Socials

Socials
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Email
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Phone
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Contact page
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About page
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Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

More by Yahoo! JAPAN (LY Corporation)

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Full revenue analysis
Read the article-style breakdown for 防災速報 - 地震、津波、豪雨など、災害情報をいち早くお届け: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
Read deep-dive →