Koji vs Kojiro

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

Name A

Koji

Boy name · Rank #4209

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Name B

Kojiro

Boy name

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Which name is more popular?

Metric Koji Kojiro
Current Rank #4209 Unranked
Total Births (all years) 611 6
Peak Year 2023 2010
Peak Year Births 33 6
Peak Decade 2010ss 2010ss
Gender Boy Boy
First Recorded Year 1922 2010

Births by Decade

Decade Koji Kojiro
1920ss 16 —
1970ss 27 —
1980ss 65 —
1990ss 73 —
2000ss 146 —
2010ss 169 6
2020ss 115 —

Recent Annual Births (2014–present)

Year Koji Kojiro
2014 15 —
2015 17 —
2016 28 —
2017 13 —
2018 14 —
2019 15 —
2020 12 —
2021 19 —
2022 26 —
2023 33 —
2024 25 —

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, 1922–2024.

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