City report · Chiba, Japan
Kashiwa Air quality today
Air quality in Kashiwa currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
AQI 33
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 6.0
- tree cover
- 13.6%
- trees in this area
- 42.6K
- more trees needed
- 51.4K
Measured across a 2 km radius around 6 Chome-1 Kashiwa, Chiba 277-0005, Japan (12.57 km²), from a satellite image of Aug 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kashiwa · AQI 33 (Good)
Kashiwa's tree count comes to 42,597 trees across 12.53 km² of land, 16 points below the 30% tree-cover level considered healthy for this area, so roughly 51,368 more trees would close the gap.
Air quality detail
Air quality in Kashiwa today: AQI 33, Good
Main pollutant: PM2.5 · Observed Nov 12, 02:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 柏市大室１２５６, 4 km away · median of 13 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.0
PM10
—
NO₂
32.0
O₃
—
SO₂
0.0
CO
343.7
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 Kashiwa's daily AQI at 35 on average, from 21 on Nov 7 to an hourly peak of 100 on Nov 6.
Where Kashiwa stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kashiwa: Critically low
13.6% tree cover against a 30% healthy-neighborhood target, across 12.53 km² of land.
Trees in this area
42,597
Target trees
93,965
More trees needed
51,368
CO₂ if planted / yr
1,130 t
Deforestation · 2001–2025
How much forest has Kashiwa lost?
Since 2001, the area within 10 km of Kashiwa has lost about 115 hectares of forest (about 160 football pitches): 4.3% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 115 haabout 160 football pitches
- Share of its forest
- 4.3%of what there was in 2000
- Cleared for good
- 100 hadeforestation: turned into farms, mines or towns
The worst year was 2008, when about 13 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 | under 1 ha | 3 ha |
| 2002 | 6 ha | under 1 ha | 7 ha |
| 2003 | 5 ha | under 1 ha | 6 ha |
| 2004 | 6 ha | under 1 ha | 6 ha |
| 2005 | 5 ha | under 1 ha | 6 ha |
| 2006 | 11 ha | 2 ha | 13 ha |
| 2007 | 4 ha | under 1 ha | 4 ha |
| 2008 | 12 ha | 1 ha | 13 ha |
| 2009 | 8 ha | 1 ha | 9 ha |
| 2010 | 3 ha | under 1 ha | 4 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 6 ha | 3 ha | 9 ha |
| 2013 | 3 ha | under 1 ha | 4 ha |
| 2014 | 1 ha | under 1 ha | 2 ha |
| 2015 | 2 ha | under 1 ha | 3 ha |
| 2016 | 3 ha | under 1 ha | 4 ha |
| 2017 | 3 ha | under 1 ha | 3 ha |
| 2018 | 1 ha | under 1 ha | 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 6 ha | under 1 ha | 6 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 4 ha | under 1 ha | 4 ha |
| 2024 | 1 ha | under 1 ha | 1 ha |
| 2025 | 2 ha | 1 ha | 3 ha |
What is causing deforestation around Kashiwa?
- Towns and roadscleared for good86% · 99 ha
- Unknown causescause unknown13% · 15 ha
Also: farms, pasture and plantations.
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
- 4,180 ha
- Forest in 2020
- 3,910 ha
- Overall change
- −265 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kashiwa shrank from about 4,180 hectares to 3,910 hectares, a net loss of about 265 hectares (−6.3%). New forest grew on about 103 hectares, but 367 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 Kashiwa
What is the air quality (AQI) in Kashiwa right now?
The latest reading for Kashiwa shows an AQI of 33 (Good), measured Nov 12, 02:00 local time by 13 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 柏市大室１２５６, 4 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Kashiwa today?
At AQI 33 (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 Kashiwa been like this week?
Over the last 7 days, the CAMS air-quality model put Kashiwa's daily AQI at 35 on average, from 21 on Nov 7 to an hourly peak of 100 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 Kashiwa lost since 2001?
Since 2001, the area within 10 km of Kashiwa has lost about 115 hectares of forest (about 160 football pitches): 4.3% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Kashiwa shrank from about 4,180 hectares to 3,910 hectares, a net loss of about 265 hectares (−6.3%). New forest grew on about 103 hectares, but 367 hectares were lost.
What is the tree count in Kashiwa?
Kashiwa has an estimated 42,597 trees across the 12.53 km² of land measured — 13.6% tree cover, 16 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Kashiwa need?
Kashiwa needs roughly 51,368 more trees to close a 16-point shortfall against its 30% tree-cover target — about 1,130 t of extra CO₂ absorbed per year once grown.
How are Kashiwa's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 6 Chome-1 Kashiwa, 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 6 Chome-1 Kashiwa; the tree count is an estimate derived from that cover.
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