Main country
Japan
79,191 people
97.9% of total
Surname
Iwai
80,876 worldwide · 34 countries
80,876
Total population
34
Countries
1 in every 100,153
Frequency
Rarity
Moderate
Dispersion
Regional
Top countries
1
Japan
79,191
97.9%
2
Brazil
727
0.9%
3
United States
609
0.8%
4
Nigeria
77
0.1%
5
Singapore
65
0.1%
World distribution
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