グラフ表示画面で
グラフ表示画面で縦横にマス目があると見やすいですね。
また、現在の使用率を○○％とどこかに表示してあると見やすい。
縦軸の電力単位は、ｋW表示の方が一般的とおもいます。
また、現在の使用率を○○％とどこかに表示してあると見やすい。
縦軸の電力単位は、ｋW表示の方が一般的とおもいます。
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Easily check Japan's electricity demand forecast across 10 regions. View actual demand, forecasts, and supply capacity with clear daily line charts. Stay informed about the power situation from Hokkaido to Okinawa.
✓Electricity demand forecasts for 10 Japanese regions
✓Actual demand, forecast, and supply capacity charts
✓Real-time usage rate display
✓Easy region switching
✓Data from regional power companies
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What's New in Brownout
2.0.1
July 6, 2026
Fixed an issue where power demand data could not be retrieved for some regions.
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FAQ
What is Brownout?
Brownout is a free iOS app that displays electricity demand forecasts for 10 regions across Japan. It shows actual demand, forecast, and supply capacity in easy-to-read line charts.
Does Brownout have ads?
No, Brownout is ad-free. Users can check electricity demand forecasts without any advertisements interrupting their experience.
What regions does Brownout cover?
Brownout covers all 10 major regions of Japan: Hokkaido, Tohoku, Tokyo, Chubu, Hokuriku, Kansai, Chugoku, Shikoku, Kyushu, and Okinawa.
How often is the data updated in Brownout?
The app fetches data from CSV files published by regional power companies. While the app itself was last updated on July 6, 2026, the frequency of the underlying data updates depends on the power companies.
What devices is Brownout compatible with?
Brownout is available for iPhone and iPad, making it accessible to a wide range of Apple users.
What is the age rating for Brownout?
Brownout has an age rating of 4+, indicating it is suitable for most users and does not contain mature content.
Where does Brownout get its data?
The app sources its electricity demand forecast data from the Denki Yoho CSV files published by each regional power company in Japan.
Is Brownout available on Android?
Based on the provided data, Brownout is an iOS application and is not available on Android devices.