Is the air in Tokyo safe today?

No. Right now the US AQI in Tokyo is 153, which counts as unhealthy. Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

When is the best time to be outside in Tokyo?

Sat 13:00–16:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 114. The worst hour is around Sat 22:00, at 194.

What is the main pollutant in Tokyo?

Fine particles (PM2.5). It drives the index right now, at 59 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

How does Tokyo's air compare with the WHO guideline?

4.9 times the guideline. Over the next 24 hours PM2.5 averages about 74 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10, NO2 and SO2 are also forecast above their guideline levels.

How many cigarettes is a day of Tokyo's air?

About 3.4 cigarettes. Over the next 24 hours PM2.5 averages about 74 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

Will air quality in Tokyo improve this week?

Tuesday looks cleanest. Its AQI peaks at 87, against 194 on Saturday, the worst day in the forecast.

Tokyo air quality

Japan · Live AQI and hourly forecast for the next 5 days · valid Sat 02:00 local time

153

Unhealthy

US AQI, mostly PM_2.5

Model estimate. Nearby measurements are shown separately.

Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

Next 24 hours: 110–194US AQI, highest around Sat 22:00
Best time outside: Sat 13:00–16:00US AQI about 114
PM_2.5 vs WHO guideline: 4.9×74 µg/m³ over 24 h, guideline 15
Cigarette equivalent: ≈ 3.4 a dayBerkeley Earth rule of thumb

Loading the live globe…

The live globe, centred on Tokyo. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Tokyo right now

Pollutant	Now	Level	Next 24 h vs WHO
Fine particles PM_2.5	59 µg/m³	Unhealthy	4.9×
Coarse particles PM₁₀	60 µg/m³	Moderate	1.7×
Nitrogen dioxide NO₂	82 µg/m³	Good	3.4×
Ozone O₃	4.0 µg/m³	Good	0.2×
Sulphur dioxide SO₂	72 µg/m³	Good	2.2×
Carbon monoxide CO	661 µg/m³	Good	0.2×
Aerosol optical depth	0.20	Whole atmosphere · dimensionless
Desert dust	0 µg/m³	Modelled surface dust
UV index	0	Low

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM_2.5, 45 for PM₁₀, 25 for NO₂, 40 for SO₂ and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline. Levels follow the US AQI, which is far less strict than the WHO, so air rated Good can still be above a guideline.

Next 48 hours

Hourly US AQI. Highest 194 around Sat 22:00, lowest 100 around Mon 01:00.

50100150200

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Tokyo

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 200.

Day	US AQI	At worst	Worst hour	PM_2.5 avg	UV max
Sat 14 Nov	110–194	Unhealthy	22:00	72	3 Moderate
Sun 15 Nov	117–184	Unhealthy	0:00	67	1 Low
Mon 16 Nov	51–114	Sensitive	0:00	23	3 Moderate
Tue 17 Nov	26–87	Moderate	18:00	16	2 Low

Common questions about the air in Tokyo

Is the air in Tokyo safe today?
No. Right now the US AQI in Tokyo is 153, which counts as unhealthy. Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.
When is the best time to be outside in Tokyo?
Sat 13:00–16:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 114. The worst hour is around Sat 22:00, at 194.
What is the main pollutant in Tokyo?
Fine particles (PM_2.5). It drives the index right now, at 59 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does Tokyo's air compare with the WHO guideline?
4.9 times the guideline. Over the next 24 hours PM_2.5 averages about 74 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM₁₀, NO₂ and SO₂ are also forecast above their guideline levels.
How many cigarettes is a day of Tokyo's air?
About 3.4 cigarettes. Over the next 24 hours PM_2.5 averages about 74 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Tokyo improve this week?
Tuesday looks cleanest. Its AQI peaks at 87, against 194 on Saturday, the worst day in the forecast.

Measured near Tokyo

Station and measurements	Distance	US AQI	Level
渋谷区笹塚１－６４－１９ OpenAQ, reference monitor PM_2.5: 22 µg/m³ · Sat 01:00 CO: 687 µg/m³ · Sat 01:00	1.4 km	75	Moderate
渋谷区本町6-6-2 OpenAQ, reference monitor PM_2.5: 22 µg/m³ · Sat 01:00 NO₂: 64 µg/m³ · Sat 01:00	2.7 km	75	Moderate
世田谷区粕谷２－１９ OpenAQ, reference monitor NO₂: 51 µg/m³ · Sat 01:00	3.5 km	25	Good

Air quality near Tokyo

US AQI right now. Cleanest nearby: Taipei (66); worst: Beijing (283). The tick on each bar is Tokyo, at 153.

Osaka 392 km W 143 Sensitive
Busan 959 km W 126 Sensitive
Seoul 1,149 km W 158 Unhealthy
Shanghai 1,754 km W 152 Unhealthy
Beijing 2,089 km W 283 Very unhealthy
Taipei 2,095 km SW 66 Moderate

All 162 cities →

About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (about 10 km inside Europe). Global runs update every 12 hours and European runs every 24 hours. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown. Nearby station measurements are independent observations, not adjustments to the forecast. The point forecast uses Open-Meteo’s CAMS products, including a separate carbon monoxide product; it can differ from the globe’s global grid. The AQI rates each hour on the US EPA scale, the same way the map colors it; official daily figures average over 24 hours (8 for ozone), so they can read lower after a short peak. Readings for 35.68°N, 139.65°E, valid 2026-11-13 17:00 UTC.