City report · Japan · Nagasaki
Nagasaki
Measured across a 2 km radius around 4 Yahatamachi, Nagasaki, 850-0801, Japan (12.57 km²)
- Tree cover
- 48.8%
- Air quality
- 48Good
- Trees in this area
- 143K
- More trees needed
- 0
- Area analyzed
- 11.77 km²land, in a 12.57 km² circle
- Satellite image
- Sep 25, 2026
Nagasaki's tree count comes to 143,498 trees across 11.77 km² of land — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 48 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Healthy tree cover
48.8% tree cover against a 30% healthy-neighborhood target, across 11.77 km² of land.
Trees in this area
143,498
Target trees
143,498
More trees needed
0
CO₂ if planted / yr
0 kg
Air quality detail
AQI 48Good
Observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.3
PM10
8.2
NO₂
2.6
O₃
102.0
SO₂
1.5
CO
249.0
Frequently asked
Questions about Nagasaki
What is the tree count in Nagasaki?
Nagasaki has an estimated 143,498 trees across the 11.77 km² of land measured — 48.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Nagasaki need?
Nagasaki has already reached its tree-cover target, so no additional trees are needed to close the gap.
What is the air quality (AQI) in Nagasaki right now?
The latest reading for Nagasaki shows an AQI of 48 (Good), observed Sep 27, 11:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.
How is Nagasaki's tree cover and air quality measured?
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 4 Yahatamachi; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS, US EPA index and may differ from street-level monitors.
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