City report · Hyōgo, Japan
Himeji Air quality today
Air quality in Himeji currently reads AQI 44 (Good): Air quality is satisfactory for everyone.
AQI 44
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.0
- tree cover
- 19.9%
- trees in this area
- 62.2K
- more trees needed
- 31.6K
Measured across a 2 km radius around Abo, Himeji, Hyogo 670-0944, Japan (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Himeji · AQI 44 (Good)
Himeji's tree count comes to 62,205 trees across 12.51 km² of land, 10 points below the 30% tree-cover level considered healthy for this area, so roughly 31,571 more trees would close the gap.
Air quality detail
Air quality in Himeji today: AQI 44, Good
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 姫路市小姓町３５の３, 2.1 km away · median of 7 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.0
PM10
—
NO₂
15.1
O₃
—
SO₂
0.0
CO
286.4
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System
- 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 Himeji's daily AQI at 40 on average, from 26 on Nov 10 to an hourly peak of 69 on Nov 6.
Where Himeji stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Himeji: Below target
19.9% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
62,205
Target trees
93,776
More trees needed
31,571
CO₂ if planted / yr
694.6 t
Deforestation · 2001–2025
How much forest has Himeji lost?
Since 2001, the area within 10 km of Himeji has lost about 102 hectares of forest (about 140 football pitches): 1.2% of the forest it had in 2000. The biggest cause was towns and roads (41%). About 47 hectares (46%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 102 haabout 140 football pitches
- Share of its forest
- 1.2%of what there was in 2000
- Cleared for good
- 47 hadeforestation: turned into farms, mines or towns
The worst year was 2011, when about 31 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 6 ha | 4 ha | 9 ha |
| 2002 | under 1 ha | under 1 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 5 ha | 2 ha | 7 ha |
| 2005 | 7 ha | 2 ha | 9 ha |
| 2006 | 5 ha | under 1 ha | 5 ha |
| 2007 | 5 ha | 4 ha | 8 ha |
| 2008 | 1 ha | 2 ha | 3 ha |
| 2009 | 1 ha | 2 ha | 3 ha |
| 2010 | under 1 ha | 1 ha | 2 ha |
| 2011 | under 1 ha | 30 ha | 31 ha |
| 2012 | under 1 ha | 2 ha | 3 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 1 ha | under 1 ha | 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 4 ha | under 1 ha | 4 ha |
| 2017 | 2 ha | under 1 ha | 2 ha |
| 2018 | 4 ha | under 1 ha | 4 ha |
| 2019 | 1 ha | under 1 ha | 1 ha |
| 2020 | under 1 ha | 3 ha | 3 ha |
| 2021 | under 1 ha | under 1 ha | 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Himeji?
- Towns and roadscleared for good41% · 42 ha
- Wildfirescan grow back37% · 37 ha
- Loggingcan grow back5.5% · 6 ha
Also: mining and energy, 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
- 9,380 ha
- Forest in 2020
- 9,380 ha
- Overall change
- +4 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Himeji stayed about the same size, at about 9,380 hectares: new forest grew on about 107 hectares, and about 103 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
In the same region
Measured cities near Himeji
Same 2 km radius, same index — so they compare directly.
- Kakogawachō-honmachi12.9 km
Japan
- Tree cover
- 4%
- Air quality
- 42
- Akashi33.3 km
Japan
- Tree cover
- 10%
- Air quality
- 39
- Kobe46.3 km
Japan
- Tree cover
- 28%
- Air quality
- 28
- Sandachō48.7 km
Japan
- Tree cover
- 34%
- Air quality
- 28
- Nishinomiya58.8 km
Japan
- Tree cover
- 8%
- Air quality
- 51
- Takarazuka60.0 km
Japan
- Tree cover
- 9%
- Air quality
- 51
Build your own
Compare Himeji with anywhere
This place
Himeji
Use this data
Put Himeji's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Himeji
What is the air quality (AQI) in Himeji right now?
The latest reading for Himeji shows an AQI of 44 (Good), measured Nov 12, 01:00 local time by 7 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 姫路市小姓町３５の３, 2.1 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Himeji today?
At AQI 44 (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 Himeji been like this week?
Over the last 7 days, the CAMS air-quality model put Himeji's daily AQI at 40 on average, from 26 on Nov 10 to an hourly peak of 69 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 Himeji lost since 2001?
Since 2001, the area within 10 km of Himeji has lost about 102 hectares of forest (about 140 football pitches): 1.2% of the forest it had in 2000. The biggest cause was towns and roads (41%). About 47 hectares (46%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Himeji stayed about the same size, at about 9,380 hectares: new forest grew on about 107 hectares, and about 103 hectares were lost.
What is the tree count in Himeji?
Himeji has an estimated 62,205 trees across the 12.51 km² of land measured — 19.9% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Himeji need?
Himeji needs roughly 31,571 more trees to close a 10-point shortfall against its 30% tree-cover target — about 694.6 t of extra CO₂ absorbed per year once grown.
How are Himeji's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Abo, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Abo; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address