Kaizen vs Kai

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

Name A

Kaizen

Boy name · Rank #506

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Name B

Kai

Boy name · Rank #76

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Which name is more popular?

Metric Kaizen Kai
Current Rank #506 #76
Total Births (all years) 2,138 66,409
Peak Year 2024 2022
Peak Year Births 602 5,366
Peak Decade 2020ss 2010ss
Gender Boy Boy
First Recorded Year 2004 1926

Births by Decade

Decade Kaizen Kai
1920ss — 6
1930ss — 6
1940ss — 10
1950ss — 148
1960ss — 341
1970ss — 593
1980ss — 960
1990ss — 2,639
2000ss 66 12,620
2010ss 465 25,976
2020ss 1,607 23,110

Recent Annual Births (2014–present)

Year Kaizen Kai
2014 42 2,411
2015 56 2,852
2016 51 2,895
2017 63 3,155
2018 78 3,462
2019 81 3,741
2020 103 3,863
2021 158 4,638
2022 257 5,366
2023 487 4,967
2024 602 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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