City report · Kumamoto, Japan
Kumamoto Air quality today
Air quality in Kumamoto currently reads AQI 17 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 17
Good
- PM2.5, fine particles (µg/m³)
- 2.4
- tree cover
- 30.0%
- trees in this area
- 93.9K
- more trees needed
- 0
Measured across a 2 km radius around 1 Chome-15 Shimasaki, Chuo Ward, Kumamoto, 860-0073, Japan (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kumamoto · AQI 17 (Good)
Kumamoto's tree count comes to 93,871 trees across 12.52 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Kumamoto today: AQI 17, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 245 km, e.g. Kasuga and Fukuoka
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.4
PM10
13.4
NO₂
7.1
O₃
76.0
SO₂
5.9
CO
177.0
- 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 Kumamoto's daily AQI at 48 on average, from 28 on Nov 10 to an hourly peak of 85 on Nov 11.
Where Kumamoto stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kumamoto: Healthy tree cover
30.0% tree cover against a 30% healthy-neighborhood target, across 12.52 km² of land.
Trees in this area
93,871
Target trees
93,871
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Kumamoto lost?
Since 2001, the area within 10 km of Kumamoto has lost about 212 hectares of forest (about 300 football pitches): 3.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 46 hectares (21%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from June 2018 of a 5 × 5 km area about 4 km northwest of the city center.
- Forest lost since 2001
- 212 haabout 300 football pitches
- Share of its forest
- 3.5%of what there was in 2000
- Cleared for good
- 46 hadeforestation: turned into farms, mines or towns
The worst year was 2018, when about 22 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 | 4 ha | 3 ha | 6 ha |
| 2002 | 3 ha | 1 ha | 4 ha |
| 2003 | 1 ha | 5 ha | 6 ha |
| 2004 | 5 ha | 7 ha | 11 ha |
| 2005 | 2 ha | 9 ha | 11 ha |
| 2006 | 2 ha | 2 ha | 4 ha |
| 2007 | 6 ha | 4 ha | 10 ha |
| 2008 | under 1 ha | 5 ha | 6 ha |
| 2009 | 1 ha | 8 ha | 9 ha |
| 2010 | 2 ha | 6 ha | 8 ha |
| 2011 | under 1 ha | under 1 ha | 2 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | 3 ha | 3 ha |
| 2015 | under 1 ha | 11 ha | 12 ha |
| 2016 | under 1 ha | 3 ha | 3 ha |
| 2017 | under 1 ha | 10 ha | 11 ha |
| 2018 | 1 ha | 21 ha | 22 ha |
| 2019 | under 1 ha | 1 ha | 2 ha |
| 2020 | under 1 ha | 20 ha | 21 ha |
| 2021 | 2 ha | 14 ha | 16 ha |
| 2022 | under 1 ha | 16 ha | 16 ha |
| 2023 | 2 ha | 4 ha | 5 ha |
| 2024 | 4 ha | 4 ha | 8 ha |
| 2025 | 6 ha | 9 ha | 15 ha |
What is causing deforestation around Kumamoto?
- Loggingcan grow back72% · 153 ha
- Towns and roadscleared for good11% · 23 ha
- Farms, pasture and plantationscleared for good11% · 23 ha
Also: 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
- 7,380 ha
- Forest in 2020
- 7,330 ha
- Overall change
- −53 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kumamoto stayed about the same size, at about 7,330 hectares: new forest grew on about 103 hectares, and about 156 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 Kumamoto
What is the air quality (AQI) in Kumamoto right now?
The latest reading for Kumamoto shows an AQI of 17 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 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 Kumamoto today?
At AQI 17 (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 Kumamoto been like this week?
Over the last 7 days, the CAMS air-quality model put Kumamoto's daily AQI at 48 on average, from 28 on Nov 10 to an hourly peak of 85 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Kumamoto lost since 2001?
Since 2001, the area within 10 km of Kumamoto has lost about 212 hectares of forest (about 300 football pitches): 3.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 46 hectares (21%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kumamoto stayed about the same size, at about 7,330 hectares: new forest grew on about 103 hectares, and about 156 hectares were lost.
What is the tree count in Kumamoto?
Kumamoto has an estimated 93,871 trees across the 12.52 km² of land measured — 30.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Kumamoto need?
Kumamoto has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Kumamoto'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 1 Chome-15 Shimasaki; the tree count is an estimate derived from that cover.
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