Kojiro vs Koji

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

Name A

Kojiro

Boy name

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Name B

Koji

Boy name · Rank #4209

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Which name is more popular?

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

Births by Decade

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

Recent Annual Births (2014–present)

Year Kojiro Koji
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, 2010–2010.

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