Air quality in Japan
Air quality index (AQI⁺) and PM2.5 air pollution in Japan • 00:41, Oct 15
Atmospheric Environmental Regional Observation System (AEROS)Tokyo MetropolisKanagawa Prefectural GovernmentOsaka Prefectural GovernmentChiba Atmosphere EnvironmentKyoto Prefecture GovernmentHyogo Atmospheric EnvironmentAichi Prefecture Air PollutionAtmospheric Environmental Fukuoka PrefectureShizuoka Prefecture Living Environment DivisionNagoya City Atmospheric EnvironmentHiroshima PrefectureHokkaido Atmospheric EnvironmentOkinawa Prefecture Environment Conservation DivisionSaitama PrefectureAtmosphere Water Quality Preservation Section, Forestry Department, Yamanashi PrefectureCity of SapporoGifu Prefectural GovernmentMie Prefecture Air Quality InformationEhime Prefecture Air Pollution Continuous Monitoring SystemS.AsanoLassalle Michael W.Weather Environment HovelTOFUKJ FamilyPayetAnonymous contributor
2 stations sponsored by The Foundation for Clean Air
Atmospheric Environmental Regional Observation System (AEROS)Tokyo MetropolisKanagawa Prefectural GovernmentOsaka Prefectural GovernmentChiba Atmosphere EnvironmentKyoto Prefecture GovernmentHyogo Atmospheric EnvironmentAichi Prefecture Air PollutionAtmospheric Environmental Fukuoka PrefectureShizuoka Prefecture Living Environment DivisionNagoya City Atmospheric EnvironmentHiroshima PrefectureHokkaido Atmospheric EnvironmentOkinawa Prefecture Environment Conservation DivisionSaitama PrefectureAtmosphere Water Quality Preservation Section, Forestry Department, Yamanashi PrefectureCity of SapporoGifu Prefectural GovernmentMie Prefecture Air Quality InformationEhime Prefecture Air Pollution Continuous Monitoring SystemS.AsanoLassalle Michael W.Weather Environment HovelTOFUKJ FamilyPayetAnonymous contributor
2 stations sponsored by The Foundation for Clean Air
Live most polluted city ranking
Real-time Japan most polluted city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 |  Kofu | 71 | |
| 2 | Omuta | 71 | |
| 3 | Fukaya | 68 | |
| 4 | Yamato | 66 | |
| 5 | Kumamoto | 62 | |
| 6 | Miyakonojo | 62 | |
| 7 | Ashiya | 59 | |
| 8 | Kagoshima | 58 | |
| 9 | Gion | 56 | |
| 10 | Iwakuni | 56 |
2025 Japan most polluted city
| Kofu, Yamanashi | 60 |
Live cleanest city ranking
Real-time Japan cleanest city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 | Kiyose | 11 | |
| 2 | Sagamihara | 11 | |
| 3 | Fujieda | 14 | |
| 4 | Tomakomai | 17 | |
| 5 | Toyama | 17 | |
| 6 | Sapporo | 19 | |
| 7 | Hayama | 21 | |
| 8 | Hakodate | 22 | |
| 9 | Kanazawa | 22 | |
| 10 | Matsumoto | 22 |
2025 Japan cleanest city
| Miyako, Iwate | 31 |
2025 Japan air quality
2025 country air quality average
How polluted is Japan?
In 2025 in Japan, the annual PM2.5 concentration was 2 times the WHO annual PM2.5 guideline.
2025 AQI⁺ country ranking
Which country had the worst air quality in 2025?
Worldwide PM2.5 ranking
2025 Japan global rank in air pollution
94/143
Wildfires in Japan
Real-time information
Active fire
1
Learn more about global air quality
Which is the most polluted state in Japan?
- Aichi
- Akita
- Aomori
- Chiba
- Ehime
- Fukui
- Fukuoka
- Fukushima
- Gifu
- Gunma
- Hiroshima
- Hokkaido
- Hyogo
- Ibaraki
- Ishikawa
- Iwate
- Kagawa
- Kagoshima
- Kanagawa
- Kochi
- Kumamoto
- Kyoto
- Mie
- Miyagi
- Miyazaki
- Nagano
- Nagasaki
- Nara
- Niigata
- Oita
- Okayama
- Okinawa
- Osaka
- Saga
- Saitama
- Shiga
- Shimane
- Shizuoka
- Tochigi
- Tokushima
- Tokyo
- Tottori
- Toyama
- Wakayama
- Yamagata
- Yamaguchi
- Yamanashi
