Air quality by country

Air quality in Japan today

Updated Sun, 25 Oct 2026 19:41:43 GMT

Good: average US AQI 47 across 176 cities Worst now: Saitama (72); cleanest: Kakamigahara (16).

Live US AQI, PM2.5 and ozone for cities across Japan, ranked from most polluted to cleanest.

Average US AQI: 47 Good
Most polluted now: Saitama AQI 72
Cleanest now: Kakamigahara AQI 16
Cities above 100: 0 unhealthy for sensitive groups or worse

Air quality in Japan today

Right now the modelled air quality in Japan averages a US AQI of 47 (Good) across the 176 cities we track. By category: 108 Good, 68 Moderate (of 176).

That is 19 points better than the worldwide average of 66 across 3,556 cities.

Saitama has the worst air at 72 with PM2.5 at 9.4 µg/m³, while Kakamigahara is cleanest at 16. No tracked city is above 100, the level where sensitive groups are advised to cut back outdoors.

Japan cities by AQI (most polluted first)

City	Region	US AQI	Category	PM2.5 µg/m³	Ozone µg/m³
Saitama	Saitama	72	Moderate	9.4	62
Kawagoe	Saitama	72	Moderate	9.4	62
Koshigaya	Saitama	72	Moderate	9.4	62
Kasukabe	Saitama	72	Moderate	9.4	62
Ageo	Saitama	72	Moderate	9.4	62
Noda	Chiba	72	Moderate	9.4	62
Kukichūō	Saitama	72	Moderate	9.4	62
Kōnosu	Saitama	72	Moderate	9.4	62
Fujimino	Saitama	72	Moderate	9.4	62
Kazo	Saitama	72	Moderate	9.4	62
Iwatsuki	Saitama	72	Moderate	9.4	62
Yono	Saitama	72	Moderate	9.4	62
Sakado	Saitama	72	Moderate	9.4	62
Utsunomiya	Tochigi	65	Moderate	6.4	57
Oyama	Tochigi	65	Moderate	5.8	53
Tochigi	Tochigi	65	Moderate	5.8	53
Koga	Ibaraki	65	Moderate	5.8	53
Tokyo	Tokyo	62	Moderate	18	40
Yokohama	Kanagawa	62	Moderate	18	40
Kawasaki	Kanagawa	62	Moderate	18	40
Ōta	Tokyo	62	Moderate	18	40
Kawaguchi	Saitama	62	Moderate	18	40
Katsushika	Tokyo	62	Moderate	18	40
Machida	Tokyo	62	Moderate	18	40
Nakano	Tokyo	62	Moderate	18	40
Tokorozawa	Saitama	62	Moderate	18	40
Kita	Tokyo	62	Moderate	18	40
Fuchū	Tokyo	62	Moderate	18	40
Minato City	Tokyo	62	Moderate	18	40
Sōka	Saitama	62	Moderate	18	40
Chōfu	Tokyo	62	Moderate	18	40
Yamato	Kanagawa	62	Moderate	18	40
Minamirinkan	Kanagawa	62	Moderate	18	40
Nishi-Tokyo-shi	Tokyo	62	Moderate	18	40
Kodaira	Tokyo	62	Moderate	18	40
Hino	Tokyo	62	Moderate	18	40
Tachikawa	Tokyo	62	Moderate	18	40
Chūō	Tokyo	62	Moderate	18	40
Niiza	Saitama	62	Moderate	18	40
Sayama	Saitama	62	Moderate	18	40
Higashimurayama	Tokyo	62	Moderate	18	40
Musashino	Tokyo	62	Moderate	18	40
Tama	Tokyo	62	Moderate	18	40
Asaka	Saitama	62	Moderate	18	40
Shimotoda	Saitama	62	Moderate	18	40
Ebina	Kanagawa	62	Moderate	18	40
Zama	Kanagawa	62	Moderate	18	40
Kokubunji	Tokyo	62	Moderate	18	40
Koganei	Tokyo	62	Moderate	18	40
Higashikurume	Tokyo	62	Moderate	18	40
Akishima	Tokyo	62	Moderate	18	40
Aihara	Kanagawa	60	Moderate	7	40
Sagamihara	Kanagawa	60	Moderate	7	40
Hachiōji	Tokyo	60	Moderate	7	40
Atsugi	Kanagawa	60	Moderate	7	40
Iruma	Saitama	60	Moderate	7	40
Ōme	Tokyo	60	Moderate	7	40
Isehara	Kanagawa	60	Moderate	7	40
Takasaki	Gunma	55	Moderate	8.2	31
Maebashi	Gunma	55	Moderate	8.2	31
Toyota	Aichi	53	Moderate	6.6	28
Okazaki	Aichi	53	Moderate	6.6	28
Sapporo	Hokkaido	52	Moderate	12.9	75
Iwaki	Fukushima	52	Moderate	10.9	71
Naha	Okinawa	52	Moderate	10	70
Okinawa	Okinawa	52	Moderate	10	70
Urasoe	Okinawa	52	Moderate	10	70
Ginowan	Okinawa	52	Moderate	10	70
Osaka	Osaka	47	Good	8.2	44
Higashiosaka	Osaka	47	Good	8.2	44
Amagasaki	Hyōgo	47	Good	8.2	44
Hirakata	Osaka	47	Good	8.2	44
Toyonaka	Osaka	47	Good	8.2	44
Suita	Osaka	47	Good	8.2	44
Nara-shi	Nara	47	Good	8.2	44
Takatsuki	Osaka	47	Good	8.2	44
Asahikawa	Hokkaido	47	Good	8.8	75
Ibaraki	Osaka	47	Good	8.2	44
Neyagawa	Osaka	47	Good	8.2	44
Itami	Hyōgo	47	Good	8.2	44
Kawanishi	Hyōgo	47	Good	8.2	44
Moriguchi	Osaka	47	Good	8.2	44
Minoh	Osaka	47	Good	8.2	44
Kadoma	Osaka	47	Good	8.2	44
Ikoma	Nara	47	Good	8.2	44
Daitō	Osaka	47	Good	8.2	44
Ikeda	Osaka	47	Good	8.2	44
Niigata	Niigata	46	Good	9.1	72
Akita	Akita	46	Good	6.2	76
Chiba	Chiba	44	Good	8.7	58
Matsudo	Chiba	44	Good	8.7	58
Kashiwa	Chiba	44	Good	8.7	58
Ichihara	Chiba	44	Good	8.7	58
Nagareyama	Chiba	44	Good	8.7	58
Yachiyo	Chiba	44	Good	8.7	58
Narashino	Chiba	44	Good	8.7	58
Urayasu	Chiba	44	Good	8.7	58
Misato, Saitama	Saitama	44	Good	8.7	58
Kisarazu	Chiba	44	Good	8.7	58
Abiko	Chiba	44	Good	8.7	58
Kamagaya	Chiba	44	Good	8.7	58
Nagoya	Aichi	43	Good	7.7	30
Ichinomiya	Aichi	43	Good	7.7	30
Kasugai	Aichi	43	Good	7.7	30
Komaki	Aichi	43	Good	7.7	30
Inazawa	Aichi	43	Good	7.7	30
Seto	Aichi	43	Good	7.7	30
Aomori	Aomori	41	Good	8.1	73
Himeji	Hyōgo	40	Good	1.8	74
Fujisawa	Kanagawa	40	Good	8.2	56
Yokosuka	Kanagawa	40	Good	8.2	56
Kakogawachō-honmachi	Hyōgo	40	Good	1.8	74
Chigasaki	Kanagawa	40	Good	8.2	56
Kamakura	Kanagawa	40	Good	8.2	56
Toyohashi	Aichi	39	Good	1.6	67
Toyokawa	Aichi	39	Good	1.6	67
Kōta, Aichi	Aichi	39	Good	1.6	67
Hiroshima	Hiroshima	37	Good	1	74
Sakai	Osaka	37	Good	6	37
Yao	Osaka	37	Good	6	37
Izumi	Osaka	37	Good	6	37
Tondabayashichō	Osaka	37	Good	6	37
Matsubara	Osaka	37	Good	6	37
Habikino	Osaka	37	Good	6	37
Kawachi-Nagano	Osaka	37	Good	6	37
Kobe	Hyōgo	36	Good	4.7	62
Kyoto	Kyoto	36	Good	3.1	66
Kitakyushu	Fukuoka	36	Good	1.1	79
Nishinomiya	Hyōgo	36	Good	4.7	62
Fukuyama	Hiroshima	36	Good	1.3	78
Ōtsu	Shiga	36	Good	3.1	66
Akashi	Hyōgo	36	Good	4.7	62
Takarazuka	Hyōgo	36	Good	4.7	62
Uji	Kyoto	36	Good	3.1	66
Onomichi	Hiroshima	36	Good	1.3	78
Iizuka	Fukuoka	36	Good	1.1	79
Okayama	Okayama	35	Good	1.6	71
Sendai	Miyagi	34	Good	11.7	52
Kagoshima	Kagoshima	34	Good	2.9	70
Yokkaichi	Mie	34	Good	2.7	56
Morioka	Iwate	34	Good	6.3	70
Suzuka	Mie	34	Good	2.7	56
Kurashiki	Okayama	33	Good	1.7	71
Takamatsu	Kagawa	33	Good	1.8	70
Kōriyama	Fukushima	33	Good	8.3	63
Kanazawa	Ishikawa	32	Good	10.4	65
Matsutō	Ishikawa	32	Good	10.4	65
Komatsu	Ishikawa	32	Good	10.4	65
Kumamoto	Kumamoto	30	Good	1.8	72
Kotō	Kumamoto	30	Good	1.8	72
Nagasaki	Nagasaki	30	Good	3.8	63
Isahaya	Nagasaki	30	Good	3.8	63
Hamamatsu	Shizuoka	29	Good	0.9	70
Matsuyama	Ehime	29	Good	1.6	58
Iwata	Shizuoka	29	Good	0.9	70
Fukuoka	Fukuoka	28	Good	3.4	60
Miyazaki	Miyazaki	28	Good	5.4	80
Kasuga	Fukuoka	28	Good	3.4	60
Chikushino-shi	Fukuoka	28	Good	3.4	60
Ōnojō	Fukuoka	28	Good	3.4	60
Shima, Mie	Mie	28	Good	1.8	78
Shizuoka	Shizuoka	27	Good	1.3	72
Minato	Wakayama	27	Good	5.7	45
Wakayama	Wakayama	27	Good	5.7	45
Ōyama, Shizuoka	Shizuoka	27	Good	1.3	72
Toyama	Toyama	26	Good	8.2	50
Ōita	Oita	25	Good	4.9	19
Beppu	Oita	25	Good	4.9	19
Nagano	Nagano	24	Good	1.7	58
Kochi, Kochi	Kochi	24	Good	1.2	52
Kurume	Fukuoka	23	Good	6	32
Fukushima	Fukushima	23	Good	9.7	60
Date	Fukushima	23	Good	9.7	60
Shinagawa	Ehime	20	Good	0.7	50
Gifu	Gifu	16	Good	2.5	31
Kakamigahara	Gifu	16	Good	2.5	31

What the US AQI numbers mean

US AQI	Category	What it means
0-50	Good	Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
51-100	Moderate	Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
101-150	Unhealthy for Sensitive Groups	People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
151-200	Unhealthy	Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
201-300	Very Unhealthy	Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors.
301-500	Hazardous	Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500.

Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.

Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).

Air quality in Japan today

Air quality in Japan today

Japan cities by AQI (most polluted first)

What the US AQI numbers mean

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