Main country
Japan
15,617 people
97.9% of total
Surname
Hirooka
15,953 worldwide · 16 countries
15,953
Total population
16
Countries
1 in every 507,741
Frequency
Rarity
Moderate
Dispersion
Regional
Top countries
1
Japan
15,617
97.9%
2
Brazil
156
1%
3
Singapore
77
0.5%
4
United States
57
0.4%
5
Canada
11
0.1%
World distribution
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