# KumoScope ~for Japan~ — See Clouds, Not Rain Clouds!

> See Clouds, Not Rain Clouds! (iPhone/iPad app by Hiroshi Terajima.)

- Source: https://appshunter.io/ios/app/kumoscope-for-japan/id6809491550 (this page in markdown: same URL + `.md`)
- Developer: [Hiroshi Terajima](https://appshunter.io/developer/1783902635)
- Category: Weather, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 8 MB
- Languages: American English
- Released: 2026-09-13
- Data updated: 2026-10-02

## What is KumoScope ~for Japan~?

Will the clouds clear? Watch them move across the map.

KumoScope is a weather app that lets you view cloud and rain-cloud information from weather satellites overlaid on a map.

In addition to showing the current cloud coverage, KumoScope lets you see how the clouds have moved over time and where rain clouds are expected to move next—all on a single timeline.

Key Features
• Display Himawari weather satellite imagery on a map (available in Japan)
• Overlay rain-cloud information on the cloud imagery
• Play back cloud and rain-cloud movement from approximately the past three hours through the present
• Display rain-cloud forecasts up to approximately 15 hours ahead
• View weather forecasts up to 14 hours ahead for a specific point on the map (tap your current location or place a pin anywhere)
• Move the time dial with your finger to jump to the time you want to see
• Switch between Satellite Image, Digital Cloud, and Weather views
• Adjust cloud opacity from 0% to 100%
• Turn rain-cloud display on or off
• View estimated sky conditions around your current location
• Switch between North Up and Heading Up
• Customize the display of city names, place names, and prefectural borders
• Automatically switch satellite imagery based on day and night

Rather than focusing only on cloud height or technical classifications, KumoScope is designed to make it easy to see at a glance whether a location is cloudy and whether rain clouds are approaching.

The timeline also indicates when cloud and rain-cloud data exists, along with the data retrieval status. This helps you determine whether an image is missing because the data has not yet been retrieved or because no data was provided for that time.

Data and Important Notes
This app uses weather satellite imagery, rain-cloud information, precipitation forecasts, weather distribution information, and other data provided on the Japan Meteorological Agency (JMA) website.

Weather data updates may be delayed. Depending on network conditions and the status of the data provider, some images may not be available.

KumoScope is not an official app of the Japan Meteorological Agency. When preparing for disasters or making decisions involving life or property, please also check the latest disaster-prevention information issued by the JMA, local governments, and other public agencies.

## Is KumoScope ~for Japan~ safe?

Not enough ratings yet to assess KumoScope ~for Japan~.

## Is KumoScope ~for Japan~ legit?

KumoScope ~for Japan~ appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for KumoScope ~for Japan~ is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.3 — 2026-09-24

Ver1.3 is improved as following
- Improved the appearance of the weather icons, including sunny, cloudy, and rainy conditions, in the point-specific weather forecast.

### 1.2 — 2026-09-22

Fixed a bug in the button in the lower right corner of the map (which determines whether to always have the map facing north or to orient the iPhone upwards).

### 1.1 — 2026-09-20

The following features have been added in version 1.1:
• Tap your current location (the blue dot) on the map to view a 14-hour forecast for your current location.
• Place a pin anywhere on the map to view a weather forecast for that location, up to 14 hours ahead.

### 1.0 — 2026-09-14

No release notes.

## More apps by Hiroshi Terajima

- [簡単重みづけ割り勘計算](https://appshunter.io/ios/app/id6739152316)
- [カナやん](https://appshunter.io/ios/app/id6739462289)
- [Beer Manager](https://appshunter.io/ios/app/beer-manager/id6800568383)
- [SkyPlane - Aircraft Radar](https://appshunter.io/ios/app/skyplane-aircraft-radar/id6806300415)
- [My Language Teacher](https://appshunter.io/ios/app/my-language-teacher/id6806634593)

All apps by Hiroshi Terajima: https://appshunter.io/developer/1783902635

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-02.*