City report · Chiba, Japan
Kisarazu Air quality today
Air quality in Kisarazu currently reads AQI 14 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 14
Good
- PM2.5, fine particles (µg/m³)
- 2.5
- tree cover
- 10.4%
- trees in this area
- 30.9K
- more trees needed
- 58.3K
Measured across a 2 km radius around 2 Chome-14 Kisarazu, Chiba 292-0056, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kisarazu · AQI 14 (Good)
Kisarazu's tree count comes to 30,941 trees across 11.9 km² of land, 20 points below the 30% tree-cover level considered healthy for this area, so roughly 58,312 more trees would close the gap.
Air quality detail
Air quality in Kisarazu today: AQI 14, Good
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 木更津市牛袋５９１－２, 3.9 km away · median of 12 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.5
PM10
—
NO₂
7.5
O₃
—
SO₂
0.0
CO
229.1
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 Kisarazu's daily AQI at 26 on average, from 11 on Nov 11 to an hourly peak of 64 on Nov 6.
Where Kisarazu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kisarazu: Critically low
10.4% tree cover against a 30% healthy-neighborhood target, across 11.9 km² of land.
Trees in this area
30,941
Target trees
89,253
More trees needed
58,312
CO₂ if planted / yr
1,283 t
Deforestation · 2001–2025
How much forest has Kisarazu lost?
Since 2001, the area within 10 km of Kisarazu has lost about 253 hectares of forest (about 350 football pitches): 4.2% of the forest it had in 2000. The biggest cause was towns and roads (44%). About 118 hectares (47%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 253 haabout 350 football pitches
- Share of its forest
- 4.2%of what there was in 2000
- Cleared for good
- 118 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 41 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 | 3 ha | 8 ha | 11 ha |
| 2002 | 3 ha | 4 ha | 7 ha |
| 2003 | 4 ha | 2 ha | 6 ha |
| 2004 | 12 ha | 9 ha | 21 ha |
| 2005 | 4 ha | 4 ha | 8 ha |
| 2006 | 9 ha | 6 ha | 15 ha |
| 2007 | 7 ha | 1 ha | 8 ha |
| 2008 | 14 ha | 1 ha | 16 ha |
| 2009 | 5 ha | 3 ha | 9 ha |
| 2010 | 4 ha | under 1 ha | 4 ha |
| 2011 | 1 ha | 3 ha | 4 ha |
| 2012 | 2 ha | 2 ha | 4 ha |
| 2013 | 2 ha | 4 ha | 6 ha |
| 2014 | under 1 ha | 3 ha | 4 ha |
| 2015 | 2 ha | 5 ha | 7 ha |
| 2016 | 4 ha | 9 ha | 13 ha |
| 2017 | 6 ha | 2 ha | 8 ha |
| 2018 | 2 ha | 2 ha | 4 ha |
| 2019 | 2 ha | 3 ha | 4 ha |
| 2020 | 11 ha | 11 ha | 22 ha |
| 2021 | 2 ha | 38 ha | 41 ha |
| 2022 | 6 ha | 8 ha | 14 ha |
| 2023 | 3 ha | 3 ha | 6 ha |
| 2024 | 7 ha | 1 ha | 8 ha |
| 2025 | 2 ha | 2 ha | 4 ha |
What is causing deforestation around Kisarazu?
- Towns and roadscleared for good44% · 112 ha
- Loggingcan grow back40% · 100 ha
- Storms, floods and other natural causescan grow back8.4% · 21 ha
Also: farms, pasture and plantations, 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
- 7,250 ha
- Forest in 2020
- 7,210 ha
- Overall change
- −44 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kisarazu stayed about the same size, at about 7,210 hectares: new forest grew on about 155 hectares, and about 199 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 Kisarazu
What is the air quality (AQI) in Kisarazu right now?
The latest reading for Kisarazu shows an AQI of 14 (Good), measured Nov 11, 22:00 local time by 12 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 木更津市牛袋５９１－２, 3.9 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Kisarazu today?
At AQI 14 (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 Kisarazu been like this week?
Over the last 7 days, the CAMS air-quality model put Kisarazu's daily AQI at 26 on average, from 11 on Nov 11 to an hourly peak of 64 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 Kisarazu lost since 2001?
Since 2001, the area within 10 km of Kisarazu has lost about 253 hectares of forest (about 350 football pitches): 4.2% of the forest it had in 2000. The biggest cause was towns and roads (44%). About 118 hectares (47%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kisarazu stayed about the same size, at about 7,210 hectares: new forest grew on about 155 hectares, and about 199 hectares were lost.
What is the tree count in Kisarazu?
Kisarazu has an estimated 30,941 trees across the 11.9 km² of land measured — 10.4% tree cover, 20 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Kisarazu need?
Kisarazu needs roughly 58,312 more trees to close a 20-point shortfall against its 30% tree-cover target — about 1,283 t of extra CO₂ absorbed per year once grown.
How are Kisarazu's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 2 Chome-14 Kisarazu, 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 2 Chome-14 Kisarazu; the tree count is an estimate derived from that cover.
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