Total babies named Sadao (all years): 244
| Year | Boys (count / rank / %) |
|---|---|
| 1934 | 7 / #3232 / 0.001% |
| 1933 | 11 / #2349 / 0.001% |
| 1931 | 7 / #3350 / 0.001% |
| 1930 | 11 / #2578 / 0.001% |
| 1929 | 15 / #2082 / 0.001% |
| 1928 | 10 / #2815 / 0.001% |
| 1927 | 8 / #3404 / 0.001% |
| 1926 | 22 / #1650 / 0.002% |
| 1925 | 14 / #2303 / 0.001% |
| 1924 | 13 / #2452 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1923 | 12 / #2586 / 0.001% |
| 1922 | 21 / #1751 / 0.002% |
| 1921 | 15 / #2249 / 0.001% |
| 1920 | 10 / #2930 / 0.001% |
| 1919 | 15 / #2135 / 0.002% |
| 1918 | 14 / #2243 / 0.001% |
| 1917 | 12 / #2400 / 0.001% |
| 1916 | 15 / #2025 / 0.002% |
| 1915 | 7 / #3349 / 0.001% |
| 1914 | 5 / #3678 / 0.001% |