Main country
Japan
5,920 people
99.4% of total
Surname
Koyasu
5,956 worldwide · 9 countries
5,956
Total population
9
Countries
1 in every 1,359,973
Frequency
Rarity
Rare
Dispersion
Local
Top countries
1
Japan
5,920
99.4%
2
United States
23
0.4%
3
Thailand
4
0.1%
4
Brazil
3
0.1%
5
Taiwan
2
0%
World distribution
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