Total babies named Masaichi (all years): 159
| Year | Boys (count / rank / %) |
|---|---|
| 1933 | 6 / #3512 / 0.001% |
| 1930 | 5 / #4352 / 0.000% |
| 1929 | 6 / #3818 / 0.001% |
| 1927 | 8 / #3343 / 0.001% |
| 1926 | 11 / #2675 / 0.001% |
| 1925 | 5 / #4653 / 0.000% |
| 1924 | 14 / #2309 / 0.001% |
| 1923 | 10 / #2878 / 0.001% |
| 1922 | 10 / #2931 / 0.001% |
| 1921 | 7 / #3751 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1920 | 7 / #3701 / 0.001% |
| 1919 | 18 / #1852 / 0.002% |
| 1918 | 21 / #1689 / 0.002% |
| 1917 | 7 / #3442 / 0.001% |
| 1916 | 7 / #3388 / 0.001% |
| 1914 | 7 / #2815 / 0.001% |
| 1913 | 5 / #3104 / 0.001% |
| 1912 | 5 / #2778 / 0.001% |