# 天気ねこ (tenkiyohou.com)

> Japanese weather forecast website. Displays official data from the Japan Meteorological Agency (JMA/気象庁). Ad-free, ultra-fast, simple.

tenkiyohou.com provides weather forecasts for all 1,788 municipalities in Japan. All data comes directly from the Japan Meteorological Agency (気象庁) with no independent forecasting.

## Site Features

- Ad-free, no cookies, no tracking
- All pages under 50KB
- Displays JMA data as-is (no independent forecasting)
- City pages update every 30 minutes; prefecture and national pages update every hour

## URL Structure

- `https://tenkiyohou.com/` — National weather overview (all 47 prefectures)
- `https://tenkiyohou.com/{prefecture}/` — Prefecture weather (regional forecast + city list)
- `https://tenkiyohou.com/{prefecture}/{city}/` — City weather (today, tomorrow, weekly forecast)
- `https://tenkiyohou.com/about/` — About page (data sources, terms of use)

## Data Source

All weather data is fetched from the Japan Meteorological Agency (気象庁) public API at `https://www.jma.go.jp/`. The site does not perform any independent forecasting.

## Docs

- [All Prefectures](https://tenkiyohou.com/): National weather overview for all 47 prefectures
- [About](https://tenkiyohou.com/about/): Data sources, terms of use

## All 47 Prefectures

- [Hokkaido](https://tenkiyohou.com/hokkaido/): 北海道
- [Aomori](https://tenkiyohou.com/aomori/): 青森県
- [Iwate](https://tenkiyohou.com/iwate/): 岩手県
- [Miyagi](https://tenkiyohou.com/miyagi/): 宮城県
- [Akita](https://tenkiyohou.com/akita/): 秋田県
- [Yamagata](https://tenkiyohou.com/yamagata/): 山形県
- [Fukushima](https://tenkiyohou.com/fukushima/): 福島県
- [Ibaraki](https://tenkiyohou.com/ibaraki/): 茨城県
- [Tochigi](https://tenkiyohou.com/tochigi/): 栃木県
- [Gunma](https://tenkiyohou.com/gunma/): 群馬県
- [Saitama](https://tenkiyohou.com/saitama/): 埼玉県
- [Chiba](https://tenkiyohou.com/chiba/): 千葉県
- [Tokyo](https://tenkiyohou.com/tokyo/): 東京都
- [Kanagawa](https://tenkiyohou.com/kanagawa/): 神奈川県
- [Niigata](https://tenkiyohou.com/niigata/): 新潟県
- [Toyama](https://tenkiyohou.com/toyama/): 富山県
- [Ishikawa](https://tenkiyohou.com/ishikawa/): 石川県
- [Fukui](https://tenkiyohou.com/fukui/): 福井県
- [Yamanashi](https://tenkiyohou.com/yamanashi/): 山梨県
- [Nagano](https://tenkiyohou.com/nagano/): 長野県
- [Gifu](https://tenkiyohou.com/gifu/): 岐阜県
- [Shizuoka](https://tenkiyohou.com/shizuoka/): 静岡県
- [Aichi](https://tenkiyohou.com/aichi/): 愛知県
- [Mie](https://tenkiyohou.com/mie/): 三重県
- [Shiga](https://tenkiyohou.com/shiga/): 滋賀県
- [Kyoto](https://tenkiyohou.com/kyoto/): 京都府
- [Osaka](https://tenkiyohou.com/osaka/): 大阪府
- [Hyogo](https://tenkiyohou.com/hyogo/): 兵庫県
- [Nara](https://tenkiyohou.com/nara/): 奈良県
- [Wakayama](https://tenkiyohou.com/wakayama/): 和歌山県
- [Tottori](https://tenkiyohou.com/tottori/): 鳥取県
- [Shimane](https://tenkiyohou.com/shimane/): 島根県
- [Okayama](https://tenkiyohou.com/okayama/): 岡山県
- [Hiroshima](https://tenkiyohou.com/hiroshima/): 広島県
- [Yamaguchi](https://tenkiyohou.com/yamaguchi/): 山口県
- [Tokushima](https://tenkiyohou.com/tokushima/): 徳島県
- [Kagawa](https://tenkiyohou.com/kagawa/): 香川県
- [Ehime](https://tenkiyohou.com/ehime/): 愛媛県
- [Kochi](https://tenkiyohou.com/kochi/): 高知県
- [Fukuoka](https://tenkiyohou.com/fukuoka/): 福岡県
- [Saga](https://tenkiyohou.com/saga/): 佐賀県
- [Nagasaki](https://tenkiyohou.com/nagasaki/): 長崎県
- [Kumamoto](https://tenkiyohou.com/kumamoto/): 熊本県
- [Oita](https://tenkiyohou.com/oita/): 大分県
- [Miyazaki](https://tenkiyohou.com/miyazaki/): 宮崎県
- [Kagoshima](https://tenkiyohou.com/kagoshima/): 鹿児島県
- [Okinawa](https://tenkiyohou.com/okinawa/): 沖縄県

## Optional

URL Examples:

- Tokyo Chiyoda: `https://tenkiyohou.com/tokyo/chiyoda-city/`
- Hokkaido Sapporo: `https://tenkiyohou.com/hokkaido/sapporo-city/`
- Osaka Osaka: `https://tenkiyohou.com/osaka/osaka-city/`