Access real-time river conditions and weather forecasts across Japan. View over 10,000 river locations on a map and check detailed precipitation, temperature, and snow data. Stay informed about weather changes to prepare for heavy rain and other natural events.
2.2.10
February 9, 2026
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More$1.99
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The River app provides real-time information on over 10,000 river locations across Japan. It displays live camera stills, detailed weather forecasts including precipitation, temperature, and snow data, and rain cloud intensity. The app aims to help users stay informed about weather changes and potential heavy rainfall.
Key features include a map displaying real-time river information, live camera feeds from river locations, automatic and manual data updates, detailed daily and weekly weather forecasts, and the ability to visualize rainfall intensity. Users can also mark favorite locations for quick access.
The app is available for free but includes in-app purchases. While the core functionality of accessing river and weather information is free, certain features or enhanced services may require a purchase.
The application is compatible with iOS devices running iOS 13.0 or later. Ensure your device meets this minimum requirement to download and use the app effectively.
The app allows you to check real-time rain cloud information, river conditions, and detailed weather forecasts, including heavy rain warnings. By monitoring rainfall intensity and river levels, you can better prepare for potential flooding or severe weather events, especially when planning outdoor activities or travel.
