City report · Aichi, Japan
Kasugai Air quality today
Air quality in Kasugai currently reads AQI 36 (Good): Air quality is satisfactory for everyone.
AQI 36
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 6.5
- tree cover
- 5.6%
- trees in this area
- 17.5K
- more trees needed
- 76.1K
Measured across a 2 km radius around 5 Chome Toriimatsucho, Kasugai, Aichi 486-0844, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kasugai · AQI 36 (Good)
Kasugai's tree count comes to 17,470 trees across 12.48 km² of land, 24 points below the 30% tree-cover level considered healthy for this area, so roughly 76,118 more trees would close the gap.
Air quality detail
Air quality in Kasugai today: AQI 36, Good
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ and World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Wakakusadori, Kasugai, Aichi, Japan (春日井市勝川小学校春日井市), 1.8 km away · median of 12 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.5
PM10
11.8
NO₂
32.9
O₃
—
SO₂
0.0
CO
229.1
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System, World Air Quality Index Project, Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム), Aichi air pollution continuous monitoring results (愛知県大気汚染常時監視結果)
- 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 Kasugai's daily AQI at 48 on average, from 31 on Nov 7 to an hourly peak of 89 on Nov 5.
Where Kasugai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kasugai: Critically low
5.6% tree cover against a 30% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
17,470
Target trees
93,588
More trees needed
76,118
CO₂ if planted / yr
1,675 t
Deforestation · 2001–2025
How much forest has Kasugai lost?
Since 2001, the area within 10 km of Kasugai has lost about 147 hectares of forest (about 210 football pitches): 4.8% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km north of the city center.
- Forest lost since 2001
- 147 haabout 210 football pitches
- Share of its forest
- 4.8%of what there was in 2000
- Cleared for good
- 135 hadeforestation: turned into farms, mines or towns
The worst year was 2008, when about 29 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 | 4 ha | 1 ha | 5 ha |
| 2002 | 8 ha | under 1 ha | 9 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 8 ha | 2 ha | 10 ha |
| 2005 | 4 ha | 3 ha | 7 ha |
| 2006 | 11 ha | under 1 ha | 12 ha |
| 2007 | 4 ha | under 1 ha | 4 ha |
| 2008 | 27 ha | 1 ha | 29 ha |
| 2009 | 10 ha | 2 ha | 11 ha |
| 2010 | 6 ha | under 1 ha | 7 ha |
| 2011 | 7 ha | under 1 ha | 7 ha |
| 2012 | 4 ha | under 1 ha | 4 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | 2 ha | under 1 ha | 2 ha |
| 2016 | 3 ha | under 1 ha | 3 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | 6 ha | under 1 ha | 6 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 2 ha | under 1 ha | 2 ha |
| 2022 | 14 ha | under 1 ha | 14 ha |
| 2023 | 4 ha | under 1 ha | 4 ha |
| 2024 | 2 ha | under 1 ha | 2 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Kasugai?
- Towns and roadscleared for good78% · 115 ha
- Mining and energycleared for good14% · 20 ha
- Loggingcan grow back3.7% · 5 ha
Also: 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
- 3,930 ha
- Forest in 2020
- 3,870 ha
- Overall change
- −61 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kasugai stayed about the same size, at about 3,870 hectares: new forest grew on about 99 hectares, and about 160 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 Kasugai
Same 2 km radius, same index — so they compare directly.
- Tajimi16.5 km
Japan
- Tree cover
- 54%
- Air quality
- 33
- Ichinomiya16.7 km
Japan
- Tree cover
- 3%
- Air quality
- 47
- Kani19.0 km
Japan
- Tree cover
- 37%
- Air quality
- 33
- Kakamigahara21.1 km
Japan
- Tree cover
- 17%
- Air quality
- 28
- Toyota24.4 km
Japan
- Tree cover
- 8%
- Air quality
- 17
- Tōkai25.7 km
Japan
- Tree cover
- 19%
- Air quality
- 46
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Frequently asked
Questions about Kasugai
What is the air quality (AQI) in Kasugai right now?
The latest reading for Kasugai shows an AQI of 36 (Good), measured Nov 12, 01:00 local time by 12 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Wakakusadori, Kasugai, Aichi, Japan (春日井市勝川小学校春日井市), 1.8 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Kasugai today?
At AQI 36 (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 Kasugai been like this week?
Over the last 7 days, the CAMS air-quality model put Kasugai's daily AQI at 48 on average, from 31 on Nov 7 to an hourly peak of 89 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Kasugai lost since 2001?
Since 2001, the area within 10 km of Kasugai has lost about 147 hectares of forest (about 210 football pitches): 4.8% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Kasugai stayed about the same size, at about 3,870 hectares: new forest grew on about 99 hectares, and about 160 hectares were lost.
What is the tree count in Kasugai?
Kasugai has an estimated 17,470 trees across the 12.48 km² of land measured — 5.6% tree cover, 24 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Kasugai need?
Kasugai needs roughly 76,118 more trees to close a 24-point shortfall against its 30% tree-cover target — about 1,675 t of extra CO₂ absorbed per year once grown.
How are Kasugai's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 5 Chome Toriimatsucho, 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 5 Chome Toriimatsucho; the tree count is an estimate derived from that cover.
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