City report · Kumamoto, Japan
Honmachi Air quality today
Air quality in Honmachi currently reads AQI 12 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 12
Good
- PM2.5, fine particles (µg/m³)
- 2.3
- tree cover
- 8.2%
- trees in this area
- 22.8K
- more trees needed
- 60.5K
Measured across a 2 km radius around 2 Chome-3 Honmachi, Yatsushiro, Kumamoto 866-0861, Japan (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Honmachi · AQI 12 (Good)
Honmachi's tree count comes to 22,773 trees across 11.11 km² of land, 22 points below the 30% tree-cover level considered healthy for this area, so roughly 60,542 more trees would close the gap.
Air quality detail
Air quality in Honmachi today: AQI 12, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 125 km, e.g. Kasuga and Fukuoka
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.3
PM10
12.9
NO₂
3.8
O₃
81.0
SO₂
5.2
CO
155.0
- 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 Honmachi's daily AQI at 37 on average, from 19 on Nov 10 to an hourly peak of 79 on Nov 6.
Where Honmachi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Honmachi: Critically low
8.2% tree cover against a 30% healthy-neighborhood target, across 11.11 km² of land.
Trees in this area
22,773
Target trees
83,315
More trees needed
60,542
CO₂ if planted / yr
1,332 t
Deforestation · 2001–2025
How much forest has Honmachi lost?
Since 2001, the area within 10 km of Honmachi has lost about 192 hectares of forest (about 270 football pitches): 2.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 20 hectares (11%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 192 haabout 270 football pitches
- Share of its forest
- 2.2%of what there was in 2000
- Cleared for good
- 20 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 26 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 | 2 ha | 6 ha | 7 ha |
| 2002 | under 1 ha | 11 ha | 11 ha |
| 2003 | under 1 ha | under 1 ha | 1 ha |
| 2004 | 3 ha | 4 ha | 6 ha |
| 2005 | under 1 ha | 12 ha | 13 ha |
| 2006 | 2 ha | 11 ha | 13 ha |
| 2007 | under 1 ha | 2 ha | 3 ha |
| 2008 | under 1 ha | under 1 ha | 1 ha |
| 2009 | under 1 ha | 4 ha | 5 ha |
| 2010 | under 1 ha | 5 ha | 6 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 2 ha | 2 ha |
| 2013 | under 1 ha | 5 ha | 5 ha |
| 2014 | under 1 ha | 6 ha | 6 ha |
| 2015 | under 1 ha | 2 ha | 2 ha |
| 2016 | under 1 ha | 11 ha | 11 ha |
| 2017 | under 1 ha | 19 ha | 19 ha |
| 2018 | 1 ha | under 1 ha | 1 ha |
| 2019 | 5 ha | 21 ha | 26 ha |
| 2020 | under 1 ha | 11 ha | 12 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | 3 ha | 4 ha |
| 2023 | 1 ha | 7 ha | 8 ha |
| 2024 | under 1 ha | 14 ha | 14 ha |
| 2025 | under 1 ha | 15 ha | 15 ha |
What is causing deforestation around Honmachi?
- Loggingcan grow back85% · 162 ha
- Towns and roadscleared for good5.9% · 11 ha
- Mining and energycleared for good4.4% · 9 ha
Also: 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
- 9,100 ha
- Forest in 2020
- 9,090 ha
- Overall change
- −8 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Honmachi stayed about the same size, at about 9,090 hectares: new forest grew on about 38 hectares, and about 46 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 Honmachi
What is the air quality (AQI) in Honmachi right now?
The latest reading for Honmachi shows an AQI of 12 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 125 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Honmachi today?
At AQI 12 (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 Honmachi been like this week?
Over the last 7 days, the CAMS air-quality model put Honmachi's daily AQI at 37 on average, from 19 on Nov 10 to an hourly peak of 79 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Honmachi lost since 2001?
Since 2001, the area within 10 km of Honmachi has lost about 192 hectares of forest (about 270 football pitches): 2.2% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 20 hectares (11%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Honmachi stayed about the same size, at about 9,090 hectares: new forest grew on about 38 hectares, and about 46 hectares were lost.
What is the tree count in Honmachi?
Honmachi has an estimated 22,773 trees across the 11.11 km² of land measured — 8.2% tree cover, 22 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Honmachi need?
Honmachi needs roughly 60,542 more trees to close a 22-point shortfall against its 30% tree-cover target — about 1,332 t of extra CO₂ absorbed per year once grown.
How are Honmachi'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 2 Chome-3 Honmachi; the tree count is an estimate derived from that cover.
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