Koya
- Region
- Chiba Ken
- Locality/admin area
- Isumi Gun
- Further admin area
- Otaki Machi
- Coordinates
- 35.2920000, 140.2443000
- Source accuracy code
- 4
🇯🇵 Japan
Postal code 298-0211
1 active place record share this country-and-code combination.
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Nearby postal codes
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Source: GeoNames postal-code snapshot checked 2026-07-18. Postal data © GeoNames.org, CC BY 4.0. Accuracy codes belong to the source and are not a ZipCodeGlobe verification claim.