Total babies named Kazuya (all years): 59
| Year | Boys (count / rank / %) |
|---|---|
| 2023 | 6 / #11551 / 0.000% |
| 2009 | 8 / #9448 / 0.000% |
| 2007 | 5 / #13427 / 0.000% |
| 2004 | 5 / #12322 / 0.000% |
| 2000 | 6 / #9727 / 0.000% |
| 1997 | 6 / #8721 / 0.000% |
| 1995 | 5 / #9607 / 0.000% |
| 1991 | 5 / #8896 / 0.000% |
| 1987 | 8 / #5215 / 0.000% |
| 1986 | 5 / #7284 / 0.000% |