Air Quality Index (AQI) in Japan 🇯🇵
Live Air Quality Index (AQI) and PM2.5 Levels in Japan
Currently, the Air Quality Index (AQI) in Tokyo, the capital of Japan, is measured at a score of 97. According to the US EPA health standard, this air quality rating is categorized as Moderate. The current atmosphere in Tokyo is influenced by a PM2.5 (fine particulate matter) concentration of 33.6 µg/m³ and PM10 levels recorded at 33.9 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 53.6 µg/m³.
Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Japan based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Yokohama, Osaka, Nagoya, Sapporo and Fukuoka. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.
Air Quality Snapshot: Japan Right Now
Across 100 monitored cities in Japan, live air quality currently ranges from a low of 3 AQI in Akita (the cleanest air right now) to a high of 98 AQI in Hachiōji (the most polluted). By US EPA health band, the nationwide distribution stands at 46 Good, 54 Moderate. The average fine-particulate (PM2.5) concentration across these cities is 12.1 µg/m³ — approximately 2.4 times the World Health Organization (WHO) annual air quality guideline of 5 µg/m³.
Japan Air Quality: Major Cities Index
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Pollution Monitor & AQI Forecast: Japan Regions
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* Air Quality Index (AQI) data for Japan is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.
What Today's Readings Mean in Japan
The median reading across 100 monitored cities is 52.5 AQI. The national spread is 95 points, from 3 in Akita to 98 in Hachiōji. Average PM2.5 is 12.1 µg/m³ (2.4× the WHO annual guideline).
At least one monitored location is in the Moderate range. People unusually sensitive to air pollution may want to reduce prolonged outdoor exertion there.
Air Quality in Japan — FAQ
Common questions about AQI levels, pollutants, and data sources for Japan.