What is the air quality in Kofu?

Kofu, Japan has an annual US AQI of 56 (Reasonable) and average PM2.5 of 12.1 µg/m³, ranking #1448 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Kofu?

September is typically the cleanest month (AQI 49) and May the most polluted (AQI 67).

Where does Kofu's air quality data come from?

PM2.5: 1998–2026 (monitors 2010–2026, satellite 1998–2010, 2018, 2024; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Kofu, Japan — Air Quality & Clean City Guide 2026

Kofu Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1448	Kofu, Japan	Asia	AQI 56	PM2.5 12.1 µg/m³