Total babies named Masahiro (all years): 63
| Year | Boys (count / rank / %) |
|---|---|
| 2014 | 5 / #13338 / 0.000% |
| 2012 | 6 / #11750 / 0.000% |
| 2003 | 5 / #12082 / 0.000% |
| 1998 | 9 / #6647 / 0.000% |
| 1994 | 6 / #8417 / 0.000% |
| 1992 | 6 / #8094 / 0.000% |
| 1990 | 7 / #6907 / 0.000% |
| 1989 | 6 / #7584 / 0.000% |
| 1927 | 5 / #4581 / 0.000% |
| 1925 | 8 / #3307 / 0.001% |