Japan · Tochigi · 6 cities
Air quality in Tochigi today The AQI right now, city by city
Right now, Ashikaga has the cleanest air of the 6 cities we track in Tochigi (AQI 26, Good), and Utsunomiya the worst (AQI 40, Good). Nasushiobara has the most tree cover, at 43.5% — #15 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
- 15.8%
- Japan: 16.4%
- worst air now: Utsunomiya
- 40
- cleanest air now: Ashikaga
- 26
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Tochigi · average AQI 36
Air quality today across Tochigi, city by city
| Utsunomiya | 40Good | 9.8% | 63.5K | #125 of 207 |
|---|---|---|---|---|
| Oyama | 37Good | 11.3% | 58.7K | #108 of 207 |
| Tochigi | 39Good | 3.6% | 82.9K | #192 of 207 |
| Ashikaga | 26Good | 21.9% | 25.4K | #50 of 207 |
| Sano | 33Good | 4.7% | 79.5K | #175 of 207 |
| Nasushiobara | 39Good | 43.5% | — | #15 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 Tochigi lost?
Since 2001, Tochigi has lost about 16,900 hectares of forest (about 24,000 football pitches): 4.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 3,130 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 16,900 haabout 24,000 football pitches
- Share of its forest
- 4.5%of what there was in 2000
- Cleared for good
- 3,130 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 | 61 ha | 275 ha | 336 ha |
| 2002 | 95 ha | 478 ha | 573 ha |
| 2003 | 36 ha | 112 ha | 148 ha |
| 2004 | 79 ha | 263 ha | 342 ha |
| 2005 | 47 ha | 224 ha | 271 ha |
| 2006 | 86 ha | 413 ha | 499 ha |
| 2007 | 148 ha | 564 ha | 712 ha |
| 2008 | 132 ha | 352 ha | 484 ha |
| 2009 | 160 ha | 390 ha | 550 ha |
| 2010 | 134 ha | 462 ha | 596 ha |
| 2011 | 77 ha | 313 ha | 390 ha |
| 2012 | 239 ha | 759 ha | 998 ha |
| 2013 | 62 ha | 299 ha | 361 ha |
| 2014 | 152 ha | 531 ha | 683 ha |
| 2015 | 104 ha | 384 ha | 488 ha |
| 2016 | 245 ha | 948 ha | 1,190 ha |
| 2017 | 109 ha | 620 ha | 729 ha |
| 2018 | 174 ha | 814 ha | 988 ha |
| 2019 | 135 ha | 741 ha | 876 ha |
| 2020 | 170 ha | 682 ha | 852 ha |
| 2021 | 177 ha | 844 ha | 1,020 ha |
| 2022 | 102 ha | 849 ha | 951 ha |
| 2023 | 120 ha | 837 ha | 957 ha |
| 2024 | 136 ha | 800 ha | 936 ha |
| 2025 | 146 ha | 857 ha | 1,000 ha |
Forest loss has stayed about the same: about 974 hectares a year in 2021–2025, against 928 hectares a year in 2016–2020. The worst year was 2016, when about 1,190 hectares of forest were lost.
What is causing deforestation in Tochigi?
- Loggingcan grow back79% · 13,400 ha
- Towns and roadscleared for good13% · 2,220 ha
- Mining and energycleared for good3.9% · 655 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.
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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