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.
Which name is more popular?
| Metric | Koji | Kojiro |
| Current Rank | #4224 | Unranked |
| Total Births (all years) | 645 | 6 |
| Peak Year | 2025 | 2010 |
| Peak Year Births | 34 | 6 |
| Peak Decade | 2010s | 2010s |
| Gender | Boy | Boy |
| First Recorded Year | 1922 | 2010 |
Births by Decade
| Decade | Koji | Kojiro |
| 1920s | 16 | - |
| 1970s | 27 | - |
| 1980s | 65 | - |
| 1990s | 73 | - |
| 2000s | 146 | - |
| 2010s | 169 | 6 |
| 2020s | 149 | - |
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 | - |
| 2025 | 34 | - |