City report · Miyazaki, Japan
Miyakonojō Air quality today
Air quality in Miyakonojō currently reads AQI 18 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 18
Good
- PM2.5, fine particles (µg/m³)
- 3.6
- tree cover
- 8.8%
- trees in this area
- 27.6K
- more trees needed
- 66.6K
Measured across a 2 km radius around 7 Hiraecho, Miyakonojo, Miyazaki 885-0021, Japan (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Miyakonojō · AQI 18 (Good)
Miyakonojō's tree count comes to 27,646 trees across 12.57 km², 21 points below the 30% tree-cover level considered healthy for this area, so roughly 66,602 more trees would close the gap.
Air quality detail
Air quality in Miyakonojō today: AQI 18, Good
Main pollutant: PM2.5 · Observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 225 km, e.g. Kasuga and Fukuoka
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.6
PM10
14.5
NO₂
12.7
O₃
13.0
SO₂
1.5
CO
155.0
- 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 Miyakonojō's daily AQI at 36 on average, from 18 on Nov 10 to an hourly peak of 71 on Nov 6.
Where Miyakonojō stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Miyakonojō: Critically low
8.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
27,646
Target trees
94,248
More trees needed
66,602
CO₂ if planted / yr
1,465 t
Deforestation · 2001–2025
How much forest has Miyakonojō lost?
Since 2001, the area within 10 km of Miyakonojō has lost about 2,480 hectares of forest (about 3,500 football pitches): 23% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 125 hectares (5.1%) 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 northwest of the city center.
- Forest lost since 2001
- 2,480 haabout 3,500 football pitches
- Share of its forest
- 23%of what there was in 2000
- Cleared for good
- 125 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 129 hectares a year in 2021–2025, against 163 hectares a year in 2016–2020. The worst year was 2018, when about 222 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 | under 1 ha | 26 ha | 26 ha |
| 2002 | 2 ha | 44 ha | 46 ha |
| 2003 | under 1 ha | 64 ha | 64 ha |
| 2004 | 10 ha | 103 ha | 112 ha |
| 2005 | 5 ha | 76 ha | 81 ha |
| 2006 | 6 ha | 73 ha | 79 ha |
| 2007 | 2 ha | 97 ha | 98 ha |
| 2008 | 4 ha | 69 ha | 73 ha |
| 2009 | 5 ha | 103 ha | 108 ha |
| 2010 | 2 ha | 52 ha | 53 ha |
| 2011 | 2 ha | 54 ha | 57 ha |
| 2012 | 3 ha | 48 ha | 51 ha |
| 2013 | 1 ha | 33 ha | 34 ha |
| 2014 | 3 ha | 58 ha | 61 ha |
| 2015 | 3 ha | 71 ha | 74 ha |
| 2016 | 9 ha | 138 ha | 147 ha |
| 2017 | 11 ha | 168 ha | 179 ha |
| 2018 | 10 ha | 212 ha | 222 ha |
| 2019 | 16 ha | 129 ha | 145 ha |
| 2020 | 5 ha | 115 ha | 120 ha |
| 2021 | 5 ha | 94 ha | 98 ha |
| 2022 | 7 ha | 156 ha | 163 ha |
| 2023 | 3 ha | 97 ha | 100 ha |
| 2024 | 5 ha | 119 ha | 124 ha |
| 2025 | 8 ha | 153 ha | 161 ha |
What is causing deforestation around Miyakonojō?
- Loggingcan grow back95% · 2,340 ha
- Towns and roadscleared for good4.8% · 120 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
- 12,100 ha
- Forest in 2020
- 11,500 ha
- Overall change
- −544 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Miyakonojō shrank from about 12,100 hectares to 11,500 hectares, a net loss of about 544 hectares (−4.5%). New forest grew on about 72 hectares, but 616 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 Miyakonojō
What is the air quality (AQI) in Miyakonojō right now?
The latest reading for Miyakonojō shows an AQI of 18 (Good), observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 225 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Miyakonojō today?
At AQI 18 (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 Miyakonojō been like this week?
Over the last 7 days, the CAMS air-quality model put Miyakonojō's daily AQI at 36 on average, from 18 on Nov 10 to an hourly peak of 71 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 Miyakonojō lost since 2001?
Since 2001, the area within 10 km of Miyakonojō has lost about 2,480 hectares of forest (about 3,500 football pitches): 23% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 125 hectares (5.1%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss has stayed about the same: about 129 hectares a year in 2021–2025, against 163 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Miyakonojō shrank from about 12,100 hectares to 11,500 hectares, a net loss of about 544 hectares (−4.5%). New forest grew on about 72 hectares, but 616 hectares were lost.
What is the tree count in Miyakonojō?
Miyakonojō has an estimated 27,646 trees across the 12.57 km² measured — 8.8% tree cover, 21 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Miyakonojō need?
Miyakonojō needs roughly 66,602 more trees to close a 21-point shortfall against its 30% tree-cover target — about 1,465 t of extra CO₂ absorbed per year once grown.
How are Miyakonojō's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 7 Hiraecho; the tree count is an estimate derived from that cover.
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