Total babies named Masako (all years): 821
| Year | Girls (count / rank / %) |
|---|---|
| 1993 | 5 / #14914 / 0.000% |
| 1976 | 7 / #7807 / 0.000% |
| 1971 | 5 / #9120 / 0.000% |
| 1943 | 5 / #5122 / 0.000% |
| 1940 | 5 / #4814 / 0.000% |
| 1937 | 9 / #3087 / 0.001% |
| 1936 | 7 / #3604 / 0.001% |
| 1935 | 12 / #2528 / 0.001% |
| 1934 | 17 / #1972 / 0.002% |
| 1933 | 13 / #2361 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1932 | 10 / #2975 / 0.001% |
| 1931 | 14 / #2269 / 0.001% |
| 1930 | 27 / #1519 / 0.002% |
| 1929 | 28 / #1473 / 0.003% |
| 1928 | 24 / #1717 / 0.002% |
| 1927 | 37 / #1323 / 0.003% |
| 1926 | 31 / #1473 / 0.003% |
| 1925 | 30 / #1526 / 0.002% |
| 1924 | 39 / #1295 / 0.003% |
| 1923 | 39 / #1260 / 0.003% |
| Year | Girls (count / rank / %) |
|---|---|
| 1922 | 53 / #1041 / 0.004% |
| 1921 | 58 / #981 / 0.005% |
| 1920 | 47 / #1098 / 0.004% |
| 1919 | 55 / #962 / 0.005% |
| 1918 | 43 / #1145 / 0.004% |
| 1917 | 31 / #1325 / 0.003% |
| 1916 | 36 / #1205 / 0.003% |
| 1915 | 34 / #1182 / 0.003% |
| 1914 | 34 / #1030 / 0.004% |
| 1913 | 34 / #921 / 0.005% |
| Year | Girls (count / rank / %) |
|---|---|
| 1912 | 18 / #1278 / 0.003% |
| 1911 | 8 / #1898 / 0.002% |
| 1909 | 6 / #2147 / 0.002% |