Main country
Japan
826 people
80.9% of total
Surname
Iwamasa
1,021 worldwide · 3 countries
1,021
Total population
3
Countries
1 in every 7,933,399
Frequency
Rarity
Rare
Dispersion
Local
Top countries
1
Japan
826
80.9%
2
United States
185
18.1%
3
Brazil
10
1%
World distribution
Loading map...