# Sunlight Checker: Sun & Shadow — Sunlight hours for Japan homes

> Sunlight hours for Japan homes (iPhone/iPad app by 株式会社リモシア.)

- Source: https://appshunter.io/ios/app/sunlight-checker-sun-and-shadow/id6759216345 (this page in markdown: same URL + `.md`)
- Developer: [株式会社リモシア](https://appshunter.io/developer/1639657831)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 10 MB
- Released: 2026-02-26
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/sunlight-checker-sun-and-shadow/id6759216345/reviews.md

## What is Sunlight Checker?

Will your next home actually get sunlight? "South-facing" on the listing doesn't tell you what the buildings around it do to the sun.

Sunlight Checker computes real sunlight hours for any address in Japan's major cities. Tap the map and it simulates the sun's path for all 12 months, using the Japanese government's official PLATEAU 3D city model to account for shadows cast by every surrounding building.

FREE FEATURES
- Sunlight hours per month and yearly average, scored S to D
- Floor selector — see how sunlight changes from the 1st to the top floor
- Building details: height, storeys, zoning, building-coverage ratio, floor-area ratio, flood and landslide risk (PLATEAU attributes, availability varies by city)
- Save up to 1,000 favorite locations

PRO FEATURES
- Hourly timeline in 15-minute steps
- 3D shadow visualization
- Direction filter (south-facing windows only, etc.)

COVERAGE
Tokyo 23 wards, Yokohama, Kawasaki, Osaka, Nagoya, Fukuoka, Sapporo, Saitama and other major cities.

PRIVACY
All computation happens on your device. Searched addresses are never sent to a server.

Note: The app interface is currently Japanese only. The map and numeric results are easy to follow, and this page's screenshots show exactly what you'll see.

Privacy policy: https://sunlightchecker.remosia.biz/privacy.html
Terms: https://sunlightchecker.remosia.biz/terms.html

Building data: Ministry of Land, Infrastructure, Transport and Tourism (MLIT) PLATEAU, adapted (https://www.mlit.go.jp/plateau/)

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 月額プラン | $1.99 | per month |
| 年額プラン（お得） | $14.99 | per year |



## Version history (last 2 releases)

### 1.1.0 — 2026-07-06

NEW: Building details (free)
Tap the building badge on a result to see the building's specs — height, storeys, usage, zoning, building-coverage and floor-area ratios, plus river-flood, storm-surge and landslide risk from Japan's official PLATEAU data. Attribute availability varies by city.

IMPROVED & FIXED
- Fixed a subtle sunlight-time offset on devices set to a non-Gregorian calendar (e.g. Japanese calendar)
- Fixed an error where building data could not be found in some areas (e.g. Osaka, Kobe, Fuchu in Hiroshima)
- More stable sheet presentation

### 1.0 — 2026-02-26

No release notes.

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## More apps by 株式会社リモシア

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All apps by 株式会社リモシア: https://appshunter.io/developer/1639657831

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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 2026-08-20.*