Burned area
satellite only207ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 29 Mar 2023 – 29 Mar 2023
+− cross-check
No official record is matched to this page to compare it with.
JP · Japan ·
Kamigori fire, March 2023 上郡町 · Kamigori
Out · last detection 29 Mar 2023, 03:58 UTC
The fire started on 29 March 2023 in Kamigori, Japan, and satellites saw it burning for 1 day. Copernicus’s global GWIS system rebuilt a burnt perimeter of 207 hectares from heat detections, spread across a single municipality.
Number 22 in Japan in 2023, of 23.
The power measured by the satellite is low (6.4 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Use this data
Compare with…
Suggestions: Kotoura · 2022Mimasaka · 2022Mimasaka · 2026
Use this data
Fire page data · version 2026-10-24matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only1day
29 Mar 2023 to 29 Mar 2023: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 29 Mar 2023, 03:58 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only29 Mar 2023
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 29 Mar 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only5
VIIRS detections at 375 m. Most intense hotspot: 6 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 29 Mar 2023 – 29 Mar 2023
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only22MW
Total radiative power on 29 March 2023; hotspots that day: 5.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 29 Mar 2023
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model2.7FWI · very low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 2.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 29 Mar 2023, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model18.2°C · 25% RH
High of 18.2 °C and minimum humidity of 25% on 29 March 2023; gusts of 16 km/h on 29 March 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 29 Mar 2023 – 29 Mar 2023
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
Living inside
model≈ 30people
Estimated residents inside the perimeter and 0.97 ha of built-up area (100 m grid, epoch 2025).
- Source
- GHSL R2023A · JRC
- Date
- calculated on 24 October 2026
+− cross-check
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed GHSLPopulation and built-up area computed
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
What was saved on 24 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 207 ha
- Dates
- 29 Mar 2023 – 29 Mar 2023
- Name
- Kamigori
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/kamigori-2023-03?v=2026-10-24A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire kamigori-2023-03.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-03-29 | 5 | 22 | 18.2 | 3 | 25 | 8.3 | 15.8 | 0 | 2.7 | muy_bajo | 1 |
| 2023-03-30 | 0 | 0 | 19.4 | 3.1 | 28 | 10.8 | 31 | 0 | 4.8 | muy_bajo | 0 |
| 2023-03-31 | 0 | 0 | 19.7 | 6.3 | 28 | 11.7 | 32.8 | 0 | 5.9 | bajo | 0 |
| 2023-04-01 | 0 | 0 | 22.8 | 5 | 25 | 13.1 | 26.3 | 0 | 8.3 | bajo | 0 |
| 2023-04-02 | 0 | 0 | 20.4 | 7.4 | 31 | 18.5 | 43.6 | 0 | 10.8 | bajo | 0 |
| 2023-04-03 | 0 | 0 | 20.1 | 8.3 | 29 | 15.6 | 31.7 | 0 | 10.8 | bajo | 0 |
| 2023-04-04 | 0 | 0 | 19.4 | 4.3 | 27 | 12.6 | 32 | 0 | 10.6 | bajo | 0 |
| 2023-04-05 | 0 | 0 | 16.1 | 12.8 | 59 | 18.2 | 49.3 | 8.5 | 0.3 | muy_bajo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 207ha
- GWIS perimeter (Copernicus)
- Duration
- 1day
- 29 Mar 2023 – 29 Mar 2023
- Municipalities hit
- 1
- municipalities
- Started on
- 29 Mar
- 2023
- Heat detections
- 5
- in a single hotspot: 6 MW
- Danger at start
- 3
- Very low · FWI index
- Average daily power
- 22MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
29 Mar29 Mar
How it evolved, day by day
29 Mar 2023 · 22 MW · 5
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
18°high
16km/h · peak gust
25%lowest humidity
It had gone 2 days without rain (1 mm or more) when it started. Rain came after the fire: 8.5 mm on 5 Apr.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
208 ha reached on 29 Mar1.4 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
People and buildings inside the perimeter
GHSL 2025Built-up area0.97 ha
Residents≈ 30
Inside the perimeter there were about 0.97 hectares of built-up land and about 30 residents (GHSL 2025, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
The weather day by day
ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.
Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 29 Mar | 18.2 °C | 25 % | 16 km/h | 0.0 mm | Very low 3 |
| 30 Mar after | 19.4 °C | 28 % | 31 km/h | 0.0 mm | Very low 5 |
| 31 Mar after | 19.7 °C | 28 % | 33 km/h | 0.0 mm | Low 6 |
| 1 Apr after | 22.8 °C | 25 % | 26 km/h | 0.0 mm | Low 8 |
| 2 Apr after | 20.4 °C | 31 % | 44 km/h | 0.0 mm | Low 11 |
| 3 Apr after | 20.1 °C | 29 % | 32 km/h | 0.0 mm | Low 11 |
| 4 Apr after | 19.4 °C | 27 % | 32 km/h | 0.0 mm | Low 11 |
| 5 Apr after | 16.1 °C | 59 % | 49 km/h | 8.5 mm | Very low 0 |
Its twins: fires that started in the same weather
It started with an FWI of 2.7, a minimum humidity of 25% and 2 days without rain. Fires in the area that started in weather like this since 2019: 2.
FWI at the start
2.7
Minimum humidity
25 %
Days without rain
2
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Kamigori fire, March 2023
207 ha
1 day
FWI 2.7
Min. humidity 25 %
Kotoura fire, April 2022
218 ha
1 day
FWI 0.6
Min. humidity 32 %
87 km away, in 2022
First rain (1 mm or more) after it ended: 10.9 mm on 21 Apr.
Mimasaka fire, April 2022
286 ha
2 days
FWI 1.0
Min. humidity 35 %
11 km away, in 2022
First rain (1 mm or more) after it ended: 14.0 mm on 21 Apr.
What happened to them
Fires in the area that started in similar weather: 2. With fewer than 15 we give no figures: they would be more noise than signal.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
8.5 mmfirst rain
5 Apr7 days after it ended
16km/h · max. gust
It was considered over on 29 Mar, and on 5 Apr 8.5 mm fell. We do not know whether the rain or the firefighters put it out.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2019.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 22 Mar 2023
After · 5 Apr 2023
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
The smoke
CAMS · CopernicusOn 31 March 2023 the air beside the fire reached 45 µg/m³ of PM2.5. That day averaged 31: 2.0 times the WHO daily guideline (15).
PM2.5 peak45 µg/m³
Days over the guideline6 days
PM1070 µg/m³
Optical depth0.54
WHO 15
27 Mar29 Mar31 Mar
Good
Fair
Moderate
Poor
Very poor
Extremely poor
Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.
Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)
Detections table · 5Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV
Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Kamigori fire last?
- GWIS (Copernicus) dates it between 29 March 2023 and 29 March 2023: 1 day between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 207 hectares (2.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Kamigori (208 ha, 1.4 %).
- What was the weather like?
- During the fire the temperature reached 18.2 °C, humidity dropped to 25 % and gusts hit 16 km/h. The fire danger index (FWI) reached 3, class Very low.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Japan (geoBoundaries). It is not an official report.
Where to verify it
A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.
Emergency number: 119 · Emergency number and official warnings
Satellite cross-check
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
RSS Changes to this page With cross-checks and a citable version
Does something look wrong on this page?
This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.
Report an error
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 5 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
Where this data comes from
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Creative Commons Attribution-ShareAlike 2.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.