Kaisen vs Kai

Side-by-side comparison of Kaisen and Kai — popularity rank, total births, peak decade, and historical trends from Social Security Administration data.

Name A

Kaisen

Boy name · Rank #900

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Name B

Kai

Boy name · Rank #76

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Which name is more popular?

Metric Kaisen Kai
Current Rank #900 #76
Total Births (all years) 2,314 66,409
Peak Year 2024 2022
Peak Year Births 261 5,366
Peak Decade 2020ss 2010ss
Gender Boy Boy
First Recorded Year 2004 1926

Births by Decade

Decade Kaisen Kai
1920ss — 6
1930ss — 6
1940ss — 10
1950ss — 148
1960ss — 341
1970ss — 593
1980ss — 960
1990ss — 2,639
2000ss 129 12,620
2010ss 1,023 25,976
2020ss 1,162 23,110

Recent Annual Births (2014–present)

Year Kaisen Kai
2014 88 2,411
2015 98 2,852
2016 152 2,895
2017 138 3,155
2018 143 3,462
2019 193 3,741
2020 192 3,863
2021 214 4,638
2022 254 5,366
2023 241 4,967
2024 261 4,276

Data Sources

Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, ssa.gov/oact/babynames.
Source: SSA Annual Name Rankings, 2004–2024.

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