Total babies named Tetsuo (all years): 268
| Year | Boys (count / rank / %) |
|---|---|
| 1944 | 5 / #3850 / 0.000% |
| 1935 | 7 / #3231 / 0.001% |
| 1934 | 13 / #2116 / 0.001% |
| 1933 | 6 / #3602 / 0.001% |
| 1930 | 9 / #2995 / 0.001% |
| 1929 | 10 / #2745 / 0.001% |
| 1928 | 14 / #2255 / 0.001% |
| 1927 | 20 / #1789 / 0.002% |
| 1926 | 13 / #2419 / 0.001% |
| 1925 | 22 / #1671 / 0.002% |
| Year | Boys (count / rank / %) |
|---|---|
| 1924 | 26 / #1526 / 0.002% |
| 1923 | 18 / #1936 / 0.002% |
| 1922 | 23 / #1638 / 0.002% |
| 1921 | 20 / #1821 / 0.002% |
| 1920 | 13 / #2441 / 0.001% |
| 1919 | 9 / #3096 / 0.001% |
| 1918 | 12 / #2521 / 0.001% |
| 1917 | 10 / #2710 / 0.001% |
| 1916 | 11 / #2522 / 0.001% |
| 1915 | 7 / #3360 / 0.001% |