SmogRank / World / Japan / October 2026

Most polluted cities in Japan, October 2026

28 cities in Japan ranked by their average PM2.5 so far (1 of 31 days). Worst: Kumamoto at 13.7 µg/m³, #272 of 1,630 cities in the world. Cleanest: Izunokuni at 3.3. A city needs measurements on 70% of the days to be ranked.

← Kumamoto 13.7 µg/m³ 20 µg/m³0
Every city in Japan ranked for October 2026, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1KumamotoKumamoto
    60
  2. 2OnomichiHiroshima
    58
  3. 3FukuyamaHiroshima
    57
  4. 4KobayashiMiyazaki
    56
  5. 5Shin’ichiHiroshima
    56
  6. 6SaijōEhime
    55
  7. 7TsukumiuraOita
    55
  8. 8AnanTokushima
    55
  9. 9FujiedaShizuoka
    54
  10. 10KagoshimaKagoshima
    53
  11. 11ShikokuchūōEhime
    53
  12. 12HijiOita
    53
  13. 13OsakaOsaka
    52
  14. 14ToyonakaOsaka
    51
  15. 15ToyotaAichi
    46
  16. 16KōnosuSaitama
    41
  17. 17MinokamoGifu
    39
  18. 18FujiShizuoka
    38
  19. 19HigashineYamagata
    37
  20. 20KōkaShiga
    34
  21. 21YokohamaKanagawa
    34
  22. 21SendaiMiyagi
    34
  23. 21FuefukiYamanashi
    34
  24. 24YachiyoChiba
    29
  25. 25IchiharaChiba
    27
  26. 26UenoharaYamanashi
    25
  27. 27NumazuShizuoka
    19
  28. 28IzunokuniShizuoka
    18
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, October 2026 · Japan now

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SmogRank, most polluted cities in Japan, PM2.5, October 2026 (so far), smogrank.com/jp/history/2026-10 (accessed 2 Oct 2026).

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