1km Mesh Pollen Index
GET
/api/v1/pollen
Get pollen index for specified latitude and longitude coordinates, calculated with 1km grid resolution. The specified latitude and longitude must be within Japan. The pollen index includes hourly information for 48 hours.
The pollen index is provided from February to mid-May.
This pollen index targets cedar and cypress pollen.
Index Codes
| Code | Description |
|---|---|
| 1 | Low |
| 2 | Moderate |
| 3 | High |
| 4 | Very High |
Forecast Update Times
- 3:10 AM
- 9:10 AM
- 3:10 PM
- 9:10 PM
Note: Manual updates may occur at times other than the above.
Parameters
Query Parameters
lat*
Latitude
Typenumber
RequiredExample
35.651377format
floatlon*
Longitude
Typenumber
RequiredExample
140.041161format
floatResponses
1km grid-based pollen index data
application/json
JSON
{
"requestId": "3909775c-5d0f-4e96-8e4f-7d3f263e2056",
"wxdata": [
{
"lat": 35.651377,
"lon": 140.041161,
"data": [
{
"date": "2025-04-09T10:00:00+09:00",
"pollen": 4,
"pollenidx": 1
}
]
}
]
}