City report · Aichi, Japan
Okazaki Air quality today
Air quality in Okazaki currently reads AQI 8 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 8
Good
- PM2.5, fine particles (µg/m³)
- 1.1
- tree cover
- 12.0%
- trees in this area
- 37.4K
- more trees needed
- 56.2K
Measured across a 2 km radius around Matoba Myodaijicho, Okazaki, Aichi 444-0864, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Okazaki · AQI 8 (Good)
Okazaki's tree count comes to 37,435 trees across 12.48 km² of land, 18 points below the 30% tree-cover level considered healthy for this area, so roughly 56,153 more trees would close the gap.
Air quality detail
Air quality in Okazaki today: AQI 8, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 6 station cities within 245 km, e.g. Matsumoto and Fuchu
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.1
PM10
5.3
NO₂
11.1
O₃
71.0
SO₂
6.9
CO
182.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Okazaki's daily AQI at 45 on average, from 27 on Nov 7 to an hourly peak of 69 on Nov 5.
Where Okazaki stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Okazaki: Critically low
12.0% tree cover against a 30% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
37,435
Target trees
93,588
More trees needed
56,153
CO₂ if planted / yr
1,235 t
Deforestation · 2001–2025
How much forest has Okazaki lost?
Since 2001, the area within 10 km of Okazaki has lost about 300 hectares of forest (about 420 football pitches): 3.3% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 300 haabout 420 football pitches
- Share of its forest
- 3.3%of what there was in 2000
- Cleared for good
- 275 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 44 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 12 ha | 2 ha | 13 ha |
| 2002 | 7 ha | 1 ha | 8 ha |
| 2003 | 3 ha | under 1 ha | 4 ha |
| 2004 | 4 ha | 2 ha | 6 ha |
| 2005 | 9 ha | under 1 ha | 10 ha |
| 2006 | 8 ha | 1 ha | 10 ha |
| 2007 | 42 ha | 2 ha | 44 ha |
| 2008 | 31 ha | under 1 ha | 32 ha |
| 2009 | 20 ha | 2 ha | 22 ha |
| 2010 | 15 ha | 1 ha | 17 ha |
| 2011 | 23 ha | under 1 ha | 24 ha |
| 2012 | 16 ha | under 1 ha | 16 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 2 ha | 1 ha | 3 ha |
| 2015 | 3 ha | under 1 ha | 3 ha |
| 2016 | 2 ha | under 1 ha | 3 ha |
| 2017 | 3 ha | 2 ha | 4 ha |
| 2018 | 2 ha | 2 ha | 4 ha |
| 2019 | 4 ha | under 1 ha | 5 ha |
| 2020 | 3 ha | 1 ha | 4 ha |
| 2021 | 2 ha | under 1 ha | 2 ha |
| 2022 | 9 ha | 3 ha | 12 ha |
| 2023 | 9 ha | under 1 ha | 9 ha |
| 2024 | 38 ha | under 1 ha | 38 ha |
| 2025 | 8 ha | under 1 ha | 9 ha |
What is causing deforestation around Okazaki?
- Towns and roadscleared for good83% · 250 ha
- Mining and energycleared for good5.7% · 17 ha
- Loggingcan grow back4.8% · 15 ha
Also: farms, pasture and plantations, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 10,100 ha
- Forest in 2020
- 10,100 ha
- Overall change
- −26 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Okazaki stayed about the same size, at about 10,100 hectares: new forest grew on about 151 hectares, and about 177 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Okazaki
What is the air quality (AQI) in Okazaki right now?
The latest reading for Okazaki shows an AQI of 8 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 245 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Okazaki today?
At AQI 8 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Okazaki been like this week?
Over the last 7 days, the CAMS air-quality model put Okazaki's daily AQI at 45 on average, from 27 on Nov 7 to an hourly peak of 69 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Okazaki lost since 2001?
Since 2001, the area within 10 km of Okazaki has lost about 300 hectares of forest (about 420 football pitches): 3.3% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Okazaki stayed about the same size, at about 10,100 hectares: new forest grew on about 151 hectares, and about 177 hectares were lost.
What is the tree count in Okazaki?
Okazaki has an estimated 37,435 trees across the 12.48 km² of land measured — 12.0% tree cover, 18 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Okazaki need?
Okazaki needs roughly 56,153 more trees to close a 18-point shortfall against its 30% tree-cover target — about 1,235 t of extra CO₂ absorbed per year once grown.
How are Okazaki's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Matoba Myodaijicho; the tree count is an estimate derived from that cover.
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