Total babies named Osamu (all years): 94
| Year | Boys (count / rank / %) |
|---|---|
| 1997 | 5 / #10379 / 0.000% |
| 1987 | 5 / #7816 / 0.000% |
| 1970 | 5 / #5243 / 0.000% |
| 1935 | 5 / #4022 / 0.000% |
| 1931 | 9 / #2824 / 0.001% |
| 1930 | 7 / #3511 / 0.001% |
| 1929 | 6 / #3847 / 0.001% |
| 1928 | 9 / #3012 / 0.001% |
| 1927 | 7 / #3696 / 0.001% |
| 1926 | 6 / #4068 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1925 | 11 / #2707 / 0.001% |
| 1924 | 6 / #4224 / 0.001% |
| 1923 | 8 / #3389 / 0.001% |
| 1920 | 5 / #4799 / 0.000% |