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 #4224

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Which name is more popular?

Metric Kojiro Koji
Current Rank Unranked #4224
Total Births (all years) 6 645
Peak Year 2010 2025
Peak Year Births 6 34
Peak Decade 2010s 2010s
Gender Boy Boy
First Recorded Year 2010 1922

Births by Decade

Decade Kojiro Koji
1920s - 16
1970s - 27
1980s - 65
1990s - 73
2000s - 146
2010s 6 169
2020s - 149

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
2025 - 34

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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