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Cities  ›  Ibaraki

Koga

茨城県古河市
Monthly max/min temperature (2010–2024)
Max Min
6,721
foreign residents live here
4.8% of the city population (139,258 residents) · Japan average 3.3%
+810 foreign residents in the past year (+13.7%)
across Japan: +9.4% · Between 2024-12 and 2025-12
By nationality
Vietnamese
1,269
Filipinos
1,079
Indonesians
927
Pakistanis
816
Sri Lankans
490
Chinese
488
Nepalese
261
Brazilians
244
Visa status
No work restriction 1,558 49%
Skilled work visa 364 12%
Tied to one employer 951 30%
Student, family and others 279 9%
Counting Brazilians, Peruvians, Filipinos, Vietnamese and Chinese.
Working age
18–55 yrs
2,469
1,407 men · 1,062 women
56–60 yrs
156
45 men · 111 women
Children and teenagers
How many children your child's age live here.
20
0
37
1
14
2
21
3
24
4
18
5
14
6
20
7
24
8
23
9
19
10
18
11
14
12
14
13
21
14
15
15
16
16
27
17
29
18
Arrivals and departures
Arrived
2,909
Left
1,929
Net
+980
from abroad
1,562
from elsewhere in Japan
1,347
abroad
484
elsewhere in Japan
1,445
Movement of foreign residents during 2025.
Open jobs (0)
No open jobs here right now.
See all jobs
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Source: Japanese government · Weather: Open-Meteo · Data from 2025–2026