Total babies named Masami (all years): 298
| Year | Boys (count / rank / %) |
|---|---|
| 2024 | — |
| 1978 | — |
| 1936 | 6 / #3404 / 0.001% |
| 1933 | 8 / #2906 / 0.001% |
| 1932 | 5 / #4106 / 0.000% |
| 1931 | 9 / #2802 / 0.001% |
| 1930 | 9 / #2930 / 0.001% |
| 1929 | 13 / #2276 / 0.001% |
| 1928 | 12 / #2480 / 0.001% |
| 1926 | 16 / #2044 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1925 | 19 / #1846 / 0.002% |
| 1924 | 17 / #2020 / 0.002% |
| 1923 | 20 / #1797 / 0.002% |
| 1922 | 25 / #1532 / 0.002% |
| 1921 | 13 / #2458 / 0.001% |
| 1920 | 12 / #2547 / 0.001% |
| 1919 | 11 / #2610 / 0.001% |
| 1918 | 17 / #1964 / 0.002% |
| 1917 | 35 / #1145 / 0.004% |
| 1916 | 8 / #3092 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1915 | 5 / #4181 / 0.001% |
| 1914 | 13 / #1832 / 0.002% |
| 1913 | 10 / #1897 / 0.002% |
| 1912 | 5 / #2779 / 0.001% |