City report · Kyoto, Japan
Uji Air quality today
Air quality in Uji currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 31
Good
- PM2.5, fine particles (µg/m³)
- 3.4
- tree cover
- 29.3%
- trees in this area
- 90.9K
- more trees needed
- 2.2K
Measured across a 2 km radius around Myoraku Uji, Kyoto 611-0021, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Uji · AQI 31 (Good)
Uji's tree count comes to 90,852 trees across 12.41 km² of land, 1 points below the 30% tree-cover level considered healthy for this area, so roughly 2,171 more trees would close the gap.
Air quality detail
Air quality in Uji today: AQI 31, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.4
PM10
4.1
NO₂
6.4
O₃
79.0
SO₂
4.3
CO
218.0
- 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 Uji's daily AQI at 48 on average, from 36 on Nov 10 to an hourly peak of 79 on Nov 5.
Where Uji stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Uji: Below target
29.3% tree cover against a 30% healthy-neighborhood target, across 12.41 km² of land.
Trees in this area
90,852
Target trees
93,023
More trees needed
2,171
CO₂ if planted / yr
47.8 t
Deforestation · 2001–2025
How much forest has Uji lost?
Since 2001, the area within 10 km of Uji has lost about 378 hectares of forest (about 530 football pitches): 3% of the forest it had in 2000. Most of it (88%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 378 haabout 530 football pitches
- Share of its forest
- 3%of what there was in 2000
- Cleared for good
- 332 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 38 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 | 10 ha | under 1 ha | 11 ha |
| 2002 | 14 ha | under 1 ha | 14 ha |
| 2003 | 2 ha | 1 ha | 3 ha |
| 2004 | 9 ha | 3 ha | 12 ha |
| 2005 | 10 ha | under 1 ha | 11 ha |
| 2006 | 6 ha | 3 ha | 10 ha |
| 2007 | 13 ha | 2 ha | 15 ha |
| 2008 | 31 ha | 5 ha | 36 ha |
| 2009 | 4 ha | 3 ha | 7 ha |
| 2010 | 11 ha | 3 ha | 13 ha |
| 2011 | 9 ha | 2 ha | 11 ha |
| 2012 | 17 ha | 4 ha | 21 ha |
| 2013 | 25 ha | under 1 ha | 26 ha |
| 2014 | 8 ha | 1 ha | 9 ha |
| 2015 | 3 ha | 1 ha | 4 ha |
| 2016 | 25 ha | 2 ha | 26 ha |
| 2017 | 4 ha | under 1 ha | 4 ha |
| 2018 | 18 ha | 1 ha | 19 ha |
| 2019 | 35 ha | 3 ha | 38 ha |
| 2020 | 17 ha | under 1 ha | 18 ha |
| 2021 | 20 ha | under 1 ha | 21 ha |
| 2022 | 21 ha | 1 ha | 22 ha |
| 2023 | 10 ha | 2 ha | 12 ha |
| 2024 | 5 ha | 3 ha | 7 ha |
| 2025 | 6 ha | 2 ha | 9 ha |
What is causing deforestation around Uji?
- Towns and roadscleared for good59% · 223 ha
- Mining and energycleared for good22% · 85 ha
- Loggingcan grow back8.2% · 31 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, 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
- 13,300 ha
- Forest in 2020
- 13,000 ha
- Overall change
- −262 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Uji stayed about the same size, at about 13,000 hectares: new forest grew on about 87 hectares, and about 349 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 Uji
What is the air quality (AQI) in Uji right now?
The latest reading for Uji shows an AQI of 31 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Uji today?
At AQI 31 (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 Uji been like this week?
Over the last 7 days, the CAMS air-quality model put Uji's daily AQI at 48 on average, from 36 on Nov 10 to an hourly peak of 79 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 Uji lost since 2001?
Since 2001, the area within 10 km of Uji has lost about 378 hectares of forest (about 530 football pitches): 3% of the forest it had in 2000. Most of it (88%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Uji stayed about the same size, at about 13,000 hectares: new forest grew on about 87 hectares, and about 349 hectares were lost.
What is the tree count in Uji?
Uji has an estimated 90,852 trees across the 12.41 km² of land measured — 29.3% tree cover, 1 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Uji need?
Uji needs roughly 2,171 more trees to close a 1-point shortfall against its 30% tree-cover target — about 47.8 t of extra CO₂ absorbed per year once grown.
How are Uji'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 Myoraku Uji; the tree count is an estimate derived from that cover.
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