Kaisei vs Kairo
Side-by-side comparison of Kaisei and Kairo - popularity rank, total births, peak decade, and historical trends from Social Security Administration data.
Which name is more popular?
| Metric | Kaisei | Kairo |
| Current Rank | #8748 | #238 |
| Total Births (all years) | 137 | 11,224 |
| Peak Year | 2007 | 2025 |
| Peak Year Births | 10 | 1,577 |
| Peak Decade | 2010s | 2020s |
| Gender | Boy | Boy |
| First Recorded Year | 2005 | 1995 |
Births by Decade
| Decade | Kaisei | Kairo |
| 1990s | - | 48 |
| 2000s | 33 | 208 |
| 2010s | 70 | 2,491 |
| 2020s | 34 | 8,477 |
Recent Annual Births (2014–present)
| Year | Kaisei | Kairo |
| 2014 | 9 | 72 |
| 2015 | 7 | 82 |
| 2016 | 6 | 153 |
| 2017 | 9 | 285 |
| 2018 | 5 | 608 |
| 2019 | 9 | 1,109 |
| 2020 | - | 1,195 |
| 2021 | 6 | 1,316 |
| 2022 | 7 | 1,415 |
| 2023 | 6 | 1,491 |
| 2024 | 9 | 1,483 |
| 2025 | 6 | 1,577 |