Fine particles
13.7µg/m³CAMS model • Open-Meteo
JapanAir quality, PM2.5 and PM10
Compare air quality across cities in this country. Explore PM2.5, PM10 and other pollutant concentrations, check data timestamps, and view recent trends and historical charts.
Japan - average concentrations across available points: PM2.5: 13.7 µg/m³, PM10: 17 µg/m³, O₃: 77.6 µg/m³, NO₂: 21 µg/m³, SO₂: 9.9 µg/m³, CO: 247.3 µg/m³. Date range: September 22, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
Lowest PM2.5: Sapporo (3 µg/m³). Highest PM2.5: Ōta-ku, Tokyo, Yokohama (32.2 µg/m³). This comparison covers 20 cities on September 22, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
Air quality questions →All cities · Japan
20 citiesJapan↗
Tokyo
PM2.532.2
PM1032.5
µg/m³
PM2.5 · ModerateNO₂ 68.4O₃ 28
September 22, 202617:00
Japan↗
Yokohama
PM2.532.2
PM1032.5
µg/m³
PM2.5 · ModerateNO₂ 68.4O₃ 28
September 22, 202617:00
Japan↗
Osaka City
PM2.512.7
PM1019.4
µg/m³
PM2.5 · FairNO₂ 7.9O₃ 89
September 22, 202617:00
Japan↗
Nagoya
PM2.511.2
PM1015.4
µg/m³
PM2.5 · FairNO₂ 11.3O₃ 91
September 22, 202617:00
Japan↗
Sapporo
PM2.53
PM104.3
µg/m³
PM2.5 · GoodNO₂ 2O₃ 82
September 22, 202617:00
Japan↗
Kōbe Shi
PM2.511.6
PM1018.4
µg/m³
PM2.5 · FairNO₂ 3.8O₃ 91
September 22, 202617:00
Japan↗
Kyoto
PM2.511.8
PM1019.1
µg/m³
PM2.5 · FairNO₂ 1.8O₃ 92
September 22, 202617:00
Japan↗
Fukuoka City
PM2.510.6
PM1015.5
µg/m³
PM2.5 · FairNO₂ 6.4O₃ 107
September 22, 202617:00
Japan↗
Saitama-shi
PM2.513.3
PM1014.7
µg/m³
PM2.5 · FairNO₂ 22.9O₃ 90
September 22, 202617:00
Japan↗
Hiroshima City
PM2.58.4
PM1012.6
µg/m³
PM2.5 · FairNO₂ 3.3O₃ 92
September 22, 202617:00
Japan↗
Sendai
PM2.58.3
PM1012.2
µg/m³
PM2.5 · FairNO₂ 2.9O₃ 89
September 22, 202617:00
Japan↗
Kitakyushu City
PM2.59.1
PM1014
µg/m³
PM2.5 · FairNO₂ 4.4O₃ 105
September 22, 202617:00
Japan↗
Chiba
PM2.510.7
PM1011.1
µg/m³
PM2.5 · FairNO₂ 37.7O₃ 45
September 22, 202617:00
Japan↗
Sakai
PM2.513.7
PM1019.8
µg/m³
PM2.5 · FairNO₂ 11.3O₃ 92
September 22, 202617:00
Japan↗
Shizuoka-shi
PM2.511.5
PM1013.6
µg/m³
PM2.5 · FairNO₂ 19O₃ 89
September 22, 202617:00
Japan↗
Kumamoto
PM2.57.9
PM1011.4
µg/m³
PM2.5 · FairNO₂ 5.8O₃ 112
September 22, 202617:00
Japan↗
Ōta-ku
PM2.532.2
PM1032.5
µg/m³
PM2.5 · ModerateNO₂ 68.4O₃ 28
September 22, 202617:00
Japan↗
Edogawa-ku
PM2.510.7
PM1011.1
µg/m³
PM2.5 · FairNO₂ 37.7O₃ 45
September 22, 202617:00
Japan↗
Sagamihara-shi
PM2.513.3
PM1014.3
µg/m³
PM2.5 · FairNO₂ 33.2O₃ 72
September 22, 202617:00
Japan↗
Okayama
PM2.59.6
PM1015.3
µg/m³
PM2.5 · FairNO₂ 3.1O₃ 85
September 22, 202617:00
PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
AVERAGE ACROSS AVAILABLE COUNTRY POINTS
Latest concentrations · Japan
Particulate matter
17µg/m³Ozone
77.6µg/m³Nitrogen dioxide
21µg/m³Sulphur dioxide
9.9µg/m³Carbon monoxide
247.3µg/m³Average of the latest available hour at each model point. This is neither a population-weighted nor a daily average.
DAILY DATA · Japan
Japan - air pollution over recent days (2026-08-31 - 2026-09-21)
Averages across available points in the country. These are not population-weighted averages.
PM2.5Lowest 5.29 2026-09-21Highest 19.08 2026-09-042026-08-31 - 2026-09-21
PM10Lowest 6.58 2026-09-21Highest 19.66 2026-09-042026-08-31 - 2026-09-21
O₃Lowest 36.55 2026-09-04Highest 71.64 2026-09-062026-08-31 - 2026-09-21
NO₂Lowest 9.22 2026-09-21Highest 35.95 2026-09-042026-08-31 - 2026-09-21
SO₂Lowest 4.47 2026-09-21Highest 19.04 2026-09-042026-08-31 - 2026-09-21
COLowest 144.24 2026-09-21Highest 262.32 2026-09-032026-08-31 - 2026-09-21
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-21 | 2026-09-20 | 2026-09-19 | 2026-09-18 | 2026-09-17 | 2026-09-16 | 2026-09-15 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 5.29 | 7.64 | 11.4 | 11.43 | 9.42 | 8.6 | 8.15 | 10.72 | 10.11 | 10.21 | 19.08 | 16.83 | 13.27 | 12.18 | 14.84 |
| PM10 | 6.58 | 8.8 | 12.35 | 13.27 | 11.25 | 9.79 | 9.06 | 12.32 | 11.85 | 11.85 | 19.66 | 18.7 | 15.78 | 14.73 | 16.51 |
| O₃ | 58.28 | 60.63 | 60.37 | 69.67 | 70.7 | 52.55 | 46.57 | 64.94 | 71.64 | 68.55 | 36.55 | 38.64 | 55.25 | 54.78 | 61.25 |
| NO₂ | 9.22 | 12.6 | 17.54 | 15.33 | 14.1 | 19.44 | 17.35 | 12.89 | 10.77 | 17.85 | 35.95 | 30.01 | 20.99 | 20.02 | 20.23 |
| SO₂ | 4.47 | 6.87 | 8.76 | 7.85 | 7.36 | 9.87 | 9.99 | 7.23 | 5.94 | 9.03 | 19.04 | 17.51 | 13.66 | 12.35 | 12.93 |
| CO | 144.24 | 153.97 | 192.36 | 197 | 185.63 | 214.4 | 217.5 | 184.74 | 166.17 | 175.21 | 240.16 | 262.32 | 239.54 | 199.33 | 184.63 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
Environment and quality of life ratings · Japan
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Japan | South Korea | North Korea | Taiwan | Northern Mariana Islands | Guam |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 65% | 61% | 50% | 53% | 83% | 29% |
| Pleasure of spending time in the city | 69% | 43% | 44% | 47% | 81% | 62% |
| Air Pollution | 33% | 69% | 44% | 61% | 11% | 33% |
| Garbage Disposal | 71% | 62% | 47% | 65% | 42% | 35% |
| Availability and quality of drinking water | 73% | 72% | 47% | 54% | 56% | 52% |
| Cleanliness and tidiness | 74% | 63% | 58% | 56% | 56% | 37% |
| Noise and Light pollution | 44% | 50% | 33% | 59% | 42% | 54% |
| Water Pollution | 36% | 38% | 56% | 58% | 58% | 46% |
WEATHER & SURROUNDINGS
Japan · weather forecast
Daily maximum and minimum temperatures. Forecast point: 36.2048, 138.2529.
Scroll the forecast to see the following days.
Japan · September 20, 2026: minimum temperature 18.7°C, maximum 23.2°C. Wind: 7.9 km/h. Humidity: 86%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-20 | 20.9 | 18.7 | 23.2 | 21.5 | 0.8 | 2.2 | 86 | 100 |
| 2026-09-21 | 19.8 | 18.3 | 22.6 | 21.5 | 9.2 | 2.5 | 91 | 100 |
| 2026-09-22 | 25.6 | 16.7 | 26.5 | 17 | 0.4 | 3.2 | 54 | 6 |
| 2026-09-23 | 21.2 | 13.2 | 21.2 | 16.8 | 1 | 2.8 | 76 | 74 |
| 2026-09-24 | 21.5 | 15.1 | 22.7 | 15.1 | 0.1 | 2.4 | 75 | 100 |
| 2026-09-25 | 24.3 | 14.6 | 24.3 | 16.6 | 3.1 | 2 | 55 | 40 |
| 2026-09-26 | 15.8 | 14.2 | 16.8 | 14.2 | 4.5 | 1.4 | 95 | 100 |
| 2026-09-27 | 15.6 | 13.8 | 15.9 | 14.9 | 14.1 | 1.8 | 97 | 100 |
| 2026-09-28 | 17.6 | 15.4 | 18.6 | 16 | 21.1 | 2.3 | 97 | 100 |
| 2026-09-29 | 21.3 | 12.9 | 21.3 | 12.9 | 4.3 | 3 | 57 | 100 |
| 2026-09-30 | 22.1 | 11.1 | 22.6 | 14.4 | 0.6 | 1.7 | 53 | 16 |
| 2026-10-01 | 24.1 | 12.3 | 24.3 | 15.7 | 11.5 | 2.5 | 41 | 91 |
| 2026-10-02 | 21.8 | 11.6 | 21.8 | 11.6 | 0.7 | 3.4 | 50 | 57 |
| 2026-10-03 | 18.5 | 8.2 | 18.5 | 11.9 | 0.9 | 1.9 | 33 | 80 |
| 2026-10-04 | 12.5 | 10.1 | 13.3 | 12.5 | 9.3 | 2.3 | 94 | 100 |
| 2026-10-05 | 24.6 | 13 | 24.6 | 14.9 | 1.5 | 2 | 55 | 86 |
| 2026-10-06 | 18.4 | 12.8 | 19.4 | 13.7 | 3.8 | 1.7 | 80 | 100 |
UV index by day · Japan
Data for a country reference point. Local conditions may differ.
You can safely stay in the sun. Sunscreen only matters on very long exposure.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Japan · September 21, 2026: UV index: 1.9 .
| Indicator | 2026-09-21 | 2026-09-22 | 2026-09-23 | 2026-09-24 | 2026-09-25 | 2026-09-26 | 2026-09-27 | 2026-09-28 | 2026-09-29 | 2026-09-30 | 2026-10-01 | 2026-10-02 | 2026-10-03 | 2026-10-04 | 2026-10-05 | 2026-10-06 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 1.9 | 6.8 | 2.7 | 5.1 | 6.6 | 0.9 | 2.3 | 3.2 | 4.5 | 6.1 | 2 | 6 | 6.1 | 5.9 | 1.3 | 5 |
AIR QUALITY QUESTIONS
Japan · air pollution - questions and answers
What do the latest air quality data show for Japan?
Japan - average concentrations across available points: PM2.5: 13.7 µg/m³, PM10: 17 µg/m³, O₃: 77.6 µg/m³, NO₂: 21 µg/m³, SO₂: 9.9 µg/m³, CO: 247.3 µg/m³. Date range: September 22, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
When was PM2.5 highest in Japan over the past week?
The highest available daily mean PM2.5 was 11.4 µg/m³ (September 18, 2026). This comparison covers 7 days with data in the seven days before September 22, 2026. The day of the latest reading is excluded because it may be incomplete.
Which cities in Japan have the cleanest and most polluted air by PM2.5?
Lowest PM2.5: Sapporo (3 µg/m³). Highest PM2.5: Ōta-ku, Tokyo, Yokohama (32.2 µg/m³). This comparison covers 20 cities on September 22, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
Is the PM2.5 concentration for Japan an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Japan?
For September 21, 2026, the forecast UV index is 1.9. The UV section also shows the following available days.
What wind speed is forecast for Japan?
For September 20, 2026, forecast wind speed is 7.9 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.