Japan · Yamaguchi · 6 cities
Air quality in Yamaguchi today The AQI right now, city by city
Right now, Ube has the cleanest air of the 6 cities we track in Yamaguchi (AQI 16, Good), and Shimonoseki the worst (AQI 48, Good). Yamaguchi has the most tree cover, at 55.3% — #6 of 207 cities measured in Japan.
Every city is measured the same way, over the same 2 km around its center: the air quality right now, from ground stations where there are any, and its tree cover.
AQI 36
Average right now
Good
- cities tracked
- 6
- average tree cover
- 19.9%
- Japan: 16.4%
- worst air now: Shimonoseki
- 48
- cleanest air now: Ube
- 16
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Yamaguchi · average AQI 36
Air quality today across Yamaguchi, city by city
| Shimonoseki | 48Good | 22.3% | 14.7K | #49 of 207 |
|---|---|---|---|---|
| Yamaguchi | 28Good | 55.3% | — | #6 of 207 |
| Ube | 16Good | 4.5% | 64.7K | #177 of 207 |
| Shūnan | 47Good | 12.8% | 44.8K | #92 of 207 |
| Iwakuni | 36Good | 17.1% | 37.7K | #72 of 207 |
| Hōfu | 39Good | 7.1% | 71.9K | #151 of 207 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 2 km of each city center from Sentinel-2 imagery; the rank compares every city measured in Japan.
Deforestation · 2001–2025
How much forest has Yamaguchi lost?
Since 2001, Yamaguchi has lost about 16,600 hectares of forest (about 23,000 football pitches): 3.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2,150 hectares (13%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 16,600 haabout 23,000 football pitches
- Share of its forest
- 3.8%of what there was in 2000
- Cleared for good
- 2,150 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 78 ha | 478 ha | 555 ha |
| 2002 | 97 ha | 616 ha | 713 ha |
| 2003 | 59 ha | 436 ha | 495 ha |
| 2004 | 91 ha | 683 ha | 774 ha |
| 2005 | 100 ha | 662 ha | 762 ha |
| 2006 | 98 ha | 610 ha | 708 ha |
| 2007 | 80 ha | 609 ha | 689 ha |
| 2008 | 65 ha | 525 ha | 590 ha |
| 2009 | 123 ha | 753 ha | 876 ha |
| 2010 | 79 ha | 717 ha | 796 ha |
| 2011 | 46 ha | 496 ha | 542 ha |
| 2012 | 46 ha | 305 ha | 351 ha |
| 2013 | 35 ha | 408 ha | 443 ha |
| 2014 | 36 ha | 426 ha | 461 ha |
| 2015 | 110 ha | 385 ha | 495 ha |
| 2016 | 129 ha | 636 ha | 765 ha |
| 2017 | 69 ha | 578 ha | 647 ha |
| 2018 | 72 ha | 705 ha | 777 ha |
| 2019 | 226 ha | 617 ha | 843 ha |
| 2020 | 213 ha | 587 ha | 800 ha |
| 2021 | 142 ha | 543 ha | 685 ha |
| 2022 | 50 ha | 771 ha | 821 ha |
| 2023 | 45 ha | 651 ha | 696 ha |
| 2024 | 35 ha | 684 ha | 719 ha |
| 2025 | 25 ha | 620 ha | 645 ha |
Forest loss has stayed about the same: about 713 hectares a year in 2021–2025, against 766 hectares a year in 2016–2020. The worst year was 2009, when about 876 hectares of forest were lost.
What is causing deforestation in Yamaguchi?
- Loggingcan grow back85% · 14,100 ha
- Towns and roadscleared for good7.2% · 1,210 ha
- Mining and energycleared for good5.3% · 889 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. How it's measured
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