Koto, Shibuya, Tokyo, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Koto, Shibuya, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (9th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 47 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Aug - 10th Aug 2025
Koto, Shibuya, Tokyo, Japan
4 AM9th Aug 2025
6 PM
3 AM10th Aug 2025
60AQI
33AQI
62AQI
48AQI
In the last 24 hours,
Koto's AQI reached its highest point of 62 at 7 PM during the Night, while the lowest point, 33, was recorded at 10 AM during the Day between 9th Aug and 10th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Koto, Shibuya, Tokyo, Japan
24°C22/26°C
24°C21/28°C
26°C24/29°C
26°C24/29°C
27°C26/28°C
27°C26/28°C
27°C26/30°C
27°C25/30°C
28°C25/30°C
28°C26/31°C
29°C27/32°C
29°C27/31°C
29°C26/31°C
29°C26/33°C
29°C27/32°C
29°C28/32°C
29°C27/32°C
29°C27/33°C
30°C26/35°C
29°C26/34°C
28°C25/32°C
28°C25/31°C
29°C26/33°C
30°C27/35°C
30°C28/33°C
31°C28/34°C
31°C28/35°C
31°C28/33°C
29°C25/33°C
28°C25/32°C
--°C/°C
45AQI
36AQI
43AQI
40AQI
2025 Days Vs Air Quality
Koto, Shibuya, Tokyo, Japan
94%
208
6%
13
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 222 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Koto, Shibuya, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
26AQI
24AQI
25AQI
25AQI
31AQI
26AQI
27AQI
25AQI
25AQI
24AQI
26AQI
28AQI
27AQI
31AQI
25AQI
28AQI
26AQI
33AQI
32AQI
33AQI
33AQI
34AQI
37AQI
34AQI
32AQI
25AQI
31AQI
26AQI
27AQI
26AQI
28AQI
30AQI
26AQI
30AQI
27AQI
27AQI
27AQI
29AQI
29AQI
25AQI
31AQI
27AQI
31AQI
27AQI
30AQI
33AQI
33AQI
30AQI
30AQI
30AQI
29AQI
31AQI
32AQI
33AQI
31AQI
34AQI
35AQI
39AQI
44AQI
47AQI
35AQI
33AQI
24AQI
30AQI
31AQI
33AQI
35AQI
33AQI
30AQI
36AQI
33AQI
28AQI
22AQI
19AQI
16AQI
17AQI
14AQI
16AQI
25AQI
26AQI
28AQI
26AQI
46AQI
62AQI
58AQI
39AQI
31AQI
41AQI
31AQI
25AQI
21AQI
18AQI
17AQI
18AQI
15AQI
17AQI
18AQI
18AQI
24AQI
23AQI
21AQI
19AQI
24AQI
20AQI
19AQI
25AQI
29AQI
35AQI
26AQI
24AQI
23AQI
16AQI
20AQI
19AQI
20AQI
21AQI
21AQI
15AQI
19AQI
19AQI
17AQI
18AQI
26AQI
22AQI
19AQI
16AQI
18AQI
18AQI
15AQI
19AQI
16AQI
21AQI
19AQI
22AQI
22AQI
20AQI
28AQI
27AQI
40AQI
32AQI
28AQI
24AQI
23AQI
18AQI
18AQI
17AQI
16AQI
18AQI
16AQI
13AQI
15AQI
20AQI
19AQI
19AQI
24AQI
31AQI
27AQI
35AQI
26AQI
25AQI
24AQI
27AQI
26AQI
22AQI
25AQI
24AQI
34AQI
28AQI
29AQI
26AQI
21AQI
12AQI
15AQI
16AQI
16AQI
17AQI
21AQI
19AQI
23AQI
38AQI
39AQI
44AQI
43AQI
45AQI
52AQI
67AQI
81AQI
81AQI
78AQI
57AQI
48AQI
51AQI
51AQI
42AQI
42AQI
40AQI
46AQI
38AQI
35AQI
34AQI
35AQI
35AQI
37AQI
40AQI
38AQI
35AQI
33AQI
38AQI
35AQI
31AQI
31AQI
33AQI
41AQI
45AQI
62AQI
51AQI
52AQI
50AQI
48AQI
47AQI
28AQI
30AQI
32AQI
21AQI
21AQI
23AQI
45AQI
48AQI
No. of days
202530AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
May21AQI
202431AQI
Highest AQI recorded in
April38AQI
Lowest AQI recorded in
September24AQI
202330AQI
Highest AQI recorded in
April41AQI
Lowest AQI recorded in
August17AQI
202233AQI
Highest AQI recorded in
August59AQI
Lowest AQI recorded in
December27AQI
202136AQI
Highest AQI recorded in
December41AQI
Lowest AQI recorded in
September33AQI
202016AQI
Highest AQI recorded in
August24AQI
Lowest AQI recorded in
April10AQI
Most & Least Polluted Years Over the Last 6 Years
Koto's annual 2025 AQI (30) shows an average percentage change of 9.7% (worsened AQI) compared to previous years: 2020 (16), 2021 (36), 2022 (33), 2023 (30), 2024 (31).