City report · Tokyo, Japan
Tokyo Air quality today
Air quality in Tokyo currently reads AQI 26 (Good): Air quality is satisfactory for everyone.
AQI 26
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.7
- tree cover
- 12.7%
- trees in this area
- 39.5K
- more trees needed
- 53.8K
Measured across a 2 km radius around 2 Chome-8 Nishishinjuku, Shinjuku City, Tokyo 160-0023, Japan (12.57 km²), from a satellite image of Jul 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tokyo · AQI 26 (Good)
Tokyo's tree count comes to 39,499 trees across 12.44 km² of land, 17 points below the 30% tree-cover level considered healthy for this area, so roughly 53,806 more trees would close the gap.
Air quality detail
Air quality in Tokyo today: AQI 26, Good
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Kamiyacho , 5.6 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.7
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, Vin_Der
- 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 Tokyo's daily AQI at 73 on average, from 61 on Nov 7 to an hourly peak of 155 on Nov 5.
Where Tokyo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tokyo: Critically low
12.7% tree cover against a 30% healthy-neighborhood target, across 12.44 km² of land.
Trees in this area
39,499
Target trees
93,305
More trees needed
53,806
CO₂ if planted / yr
1,184 t
Deforestation · 2001–2025
How much forest has Tokyo lost?
Since 2001, the area within 10 km of Tokyo has lost about 4 hectares of forest (about 6 football pitches): under 1% of the forest it had in 2000. The biggest cause was towns and roads (23%). Almost none of it was deforestation, meaning forest cleared for good.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 4 haabout 6 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
The worst year was 2012, when about 1 hectare 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 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Tokyo?
- Towns and roadscleared for good23% · under 1 ha
- Unknown causescause unknown77% · 3 ha
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
- 1,580 ha
- Forest in 2020
- 1,610 ha
- Overall change
- +31 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tokyo stayed about the same size, at about 1,610 hectares: new forest grew on about 81 hectares, and about 49 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
In the same region
Measured cities near Tokyo
Same 2 km radius, same index — so they compare directly.
- Kawaguchi13.0 km
Japan
- Tree cover
- 4%
- Air quality
- 54
- Kawasaki18.9 km
Japan
- Tree cover
- 3%
- Air quality
- 55
- Niiza19.0 km
Japan
- Tree cover
- 11%
- Air quality
- 43
- Fuchū19.0 km
Japan
- Tree cover
- 14%
- Air quality
- 33
- Urayasu19.2 km
Japan
- Tree cover
- 8%
- Air quality
- 55
- Matsudo21.4 km
Japan
- Tree cover
- 11%
- Air quality
- 46
Also compared:Tokyo vs YokohamaTokyo vs OsakaTokyo vs NagoyaTokyo vs Sapporo
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Frequently asked
Questions about Tokyo
What is the air quality (AQI) in Tokyo right now?
The latest reading for Tokyo shows an AQI of 26 (Good), measured Nov 12, 01:00 local time by the Kamiyacho ground monitoring station, 5.6 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Tokyo today?
At AQI 26 (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 Tokyo been like this week?
Over the last 7 days, the CAMS air-quality model put Tokyo's daily AQI at 73 on average, from 61 on Nov 7 to an hourly peak of 155 on Nov 5. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Tokyo lost since 2001?
Since 2001, the area within 10 km of Tokyo has lost about 4 hectares of forest (about 6 football pitches): under 1% of the forest it had in 2000. The biggest cause was towns and roads (23%). Almost none of it was deforestation, meaning forest cleared for good. Comparing satellite maps from 2000 and 2020, the forest around Tokyo stayed about the same size, at about 1,610 hectares: new forest grew on about 81 hectares, and about 49 hectares were lost.
What is the tree count in Tokyo?
Tokyo has an estimated 39,499 trees across the 12.44 km² of land measured — 12.7% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Tokyo need?
Tokyo needs roughly 53,806 more trees to close a 17-point shortfall against its 30% tree-cover target — about 1,184 t of extra CO₂ absorbed per year once grown.
How are Tokyo's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 2 Chome-8 Nishishinjuku, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 2 Chome-8 Nishishinjuku; the tree count is an estimate derived from that cover.
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