Kokubunjicho Nii, Sakaidecho, Kagawa, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Kokubunjicho Nii, Sakaidecho, Kagawa, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (6th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Oct - 8th Oct 2025
Kokubunjicho Nii, Sakaidecho, Kagawa, Japan
5 AM7th Oct 2025
6 PM
4 AM8th Oct 2025
AQI
AQI
61AQI
43AQI
In the last 24 hours,
Kokubunjicho Nii's AQI reached its highest point of 61 at 3 AM during the Night, while the lowest point, undefined, was recorded at 7 PM during the Night between 7th Oct and 8th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Kokubunjicho Nii, Sakaidecho, Kagawa, Japan
28°C25/31°C
29°C26/31°C
28°C25/32°C
26°C24/28°C
27°C24/30°C
27°C25/30°C
28°C26/31°C
28°C26/31°C
28°C26/30°C
28°C26/31°C
27°C24/29°C
25°C23/26°C
26°C24/28°C
24°C22/27°C
23°C20/25°C
23°C22/24°C
25°C23/28°C
25°C24/27°C
26°C24/28°C
24°C22/25°C
23°C21/25°C
24°C21/26°C
23°C20/25°C
23°C20/26°C
23°C20/25°C
21°C20/22°C
23°C21/25°C
24°C23/27°C
24°C21/27°C
--°C/°C
--°C/°C
37AQI
32AQI
37AQI
37AQI
2025 Days Vs Air Quality
Kokubunjicho Nii, Sakaidecho, Kagawa, Japan
72%
200
28%
78
0.3%
1
Total number of days with different AQI categories in last 280 days in 2025 (85 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 280 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Kokubunjicho Nii, Sakaidecho, Kagawa, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
37AQI
46AQI
38AQI
33AQI
32AQI
41AQI
33AQI
31AQI
29AQI
28AQI
28AQI
31AQI
34AQI
47AQI
39AQI
36AQI
32AQI
32AQI
41AQI
42AQI
44AQI
58AQI
67AQI
68AQI
43AQI
42AQI
32AQI
36AQI
31AQI
40AQI
54AQI
62AQI
42AQI
48AQI
37AQI
39AQI
31AQI
33AQI
31AQI
30AQI
31AQI
31AQI
35AQI
30AQI
33AQI
29AQI
43AQI
41AQI
36AQI
35AQI
32AQI
33AQI
34AQI
35AQI
33AQI
37AQI
38AQI
58AQI
70AQI
84AQI
80AQI
53AQI
44AQI
34AQI
39AQI
35AQI
37AQI
38AQI
40AQI
35AQI
45AQI
49AQI
39AQI
35AQI
23AQI
34AQI
27AQI
34AQI
42AQI
54AQI
59AQI
63AQI
69AQI
70AQI
73AQI
73AQI
51AQI
44AQI
37AQI
37AQI
34AQI
38AQI
27AQI
32AQI
38AQI
44AQI
42AQI
39AQI
56AQI
56AQI
57AQI
49AQI
38AQI
51AQI
28AQI
44AQI
48AQI
56AQI
57AQI
55AQI
39AQI
44AQI
34AQI
30AQI
51AQI
52AQI
54AQI
52AQI
43AQI
55AQI
54AQI
38AQI
49AQI
37AQI
40AQI
31AQI
33AQI
29AQI
30AQI
30AQI
32AQI
48AQI
52AQI
58AQI
55AQI
55AQI
42AQI
47AQI
53AQI
64AQI
53AQI
38AQI
49AQI
36AQI
30AQI
30AQI
38AQI
41AQI
40AQI
40AQI
38AQI
44AQI
50AQI
33AQI
41AQI
43AQI
51AQI
55AQI
65AQI
46AQI
32AQI
40AQI
58AQI
55AQI
35AQI
30AQI
41AQI
33AQI
46AQI
49AQI
54AQI
54AQI
52AQI
40AQI
41AQI
39AQI
43AQI
51AQI
54AQI
56AQI
60AQI
60AQI
96AQI
95AQI
107AQI
87AQI
68AQI
65AQI
68AQI
76AQI
73AQI
55AQI
51AQI
46AQI
41AQI
51AQI
56AQI
39AQI
36AQI
34AQI
33AQI
33AQI
42AQI
37AQI
35AQI
27AQI
25AQI
23AQI
24AQI
33AQI
39AQI
39AQI
44AQI
45AQI
47AQI
60AQI
51AQI
51AQI
47AQI
48AQI
44AQI
44AQI
33AQI
35AQI
40AQI
45AQI
46AQI
43AQI
41AQI
46AQI
45AQI
45AQI
42AQI
40AQI
47AQI
51AQI
52AQI
55AQI
54AQI
53AQI
54AQI
54AQI
53AQI
38AQI
34AQI
41AQI
29AQI
26AQI
27AQI
32AQI
35AQI
34AQI
34AQI
30AQI
30AQI
31AQI
34AQI
38AQI
40AQI
47AQI
31AQI
28AQI
39AQI
25AQI
27AQI
29AQI
27AQI
27AQI
32AQI
23AQI
26AQI
24AQI
30AQI
48AQI
50AQI
53AQI
51AQI
52AQI
54AQI
40AQI
38AQI
48AQI
45AQI
42AQI
46AQI
51AQI
47AQI
32AQI
51AQI
No. of days
202543AQI
Highest AQI recorded in
July51AQI
Lowest AQI recorded in
September32AQI
202436AQI
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
December31AQI
202338AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
August27AQI
202239AQI
Highest AQI recorded in
August51AQI
Lowest AQI recorded in
September32AQI
202135AQI
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
August31AQI
202036AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
July28AQI
Most & Least Polluted Years Over the Last 6 Years
Kokubunjicho Nii's annual 2025 AQI (43) shows an average percentage change of 18.04% (worsened AQI) compared to previous years: 2020 (36), 2021 (35), 2022 (39), 2023 (38), 2024 (36).