Total babies named Seiya (all years): 102
| Year | Boys (count / rank / %) |
|---|---|
| 2024 | 9 / #8822 / 0.001% |
| 2021 | 8 / #9540 / 0.000% |
| 2020 | 6 / #11784 / 0.000% |
| 2019 | 5 / #13798 / 0.000% |
| 2015 | 7 / #10437 / 0.000% |
| 2014 | 5 / #13727 / 0.000% |
| 2012 | 7 / #10569 / 0.000% |
| 2010 | 6 / #11944 / 0.000% |
| 2008 | 10 / #8198 / 0.000% |
| 2007 | 5 / #14045 / 0.000% |
| Year | Boys (count / rank / %) |
|---|---|
| 2005 | 10 / #7552 / 0.001% |
| 2002 | 6 / #10444 / 0.000% |
| 2001 | 6 / #10335 / 0.000% |
| 1998 | 6 / #9447 / 0.000% |
| 1996 | 6 / #8835 / 0.000% |