The data represents the average value from all the stations in the city, that monitor PM 2.5 as one of their pollutants.
The ranking of most polluted cities is subject to regular changes as the PM 2.5 concentration is affected by wind etc.
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Most polluted cities based on PM 2.5 concentration Japan 2025
As of August 2025, ** was the most polluted city, with a fine particulate matter pollution of ** micrograms per cubic meter of air. The overall fine particulate matter concentration in Japan decreased in recent years.
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IQAir. (August 11, 2025). Most polluted cities based on fine particulate matter concentration in Japan as of August 2025 (in micrograms per cubic meter of air) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 22, 2026, from /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/
IQAir. "Most polluted cities based on fine particulate matter concentration in Japan as of August 2025 (in micrograms per cubic meter of air)." Chart. August 11, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 22, 2026. /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/
IQAir. (2025). Most polluted cities based on fine particulate matter concentration in Japan as of August 2025 (in micrograms per cubic meter of air). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 22, 2026. /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/
IQAir. "Most Polluted Cities Based on Fine Particulate Matter Concentration in Japan as of August 2025 (in Micrograms per Cubic Meter of Air)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 11 Aug 2025, /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/
IQAir, Most polluted cities based on fine particulate matter concentration in Japan as of August 2025 (in micrograms per cubic meter of air) ÌÇÐÄÆƽâ°æ, /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/ (last visited July 22, 2026)
Most polluted cities based on fine particulate matter concentration in Japan as of August 2025 (in micrograms per cubic meter of air) [Graph], IQAir, August 11, 2025. [Online]. Available: /statistics/1332551/japan-most-polluted-cities-based-on-pm-25-concentration/
