Total babies named Kaoru (all years): 251
| Year | Boys (count / rank / %) |
|---|---|
| 1999 | 6 / #9302 / 0.000% |
| 1994 | — |
| 1992 | — |
| 1982 | — |
| 1929 | 6 / #3760 / 0.001% |
| 1928 | 6 / #3933 / 0.001% |
| 1927 | 7 / #3637 / 0.001% |
| 1926 | 7 / #3562 / 0.001% |
| 1925 | 11 / #2675 / 0.001% |
| 1924 | 12 / #2555 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1923 | 10 / #2856 / 0.001% |
| 1922 | 11 / #2716 / 0.001% |
| 1921 | 17 / #2023 / 0.002% |
| 1920 | 14 / #2283 / 0.001% |
| 1919 | 9 / #3004 / 0.001% |
| 1918 | 11 / #2625 / 0.001% |
| 1917 | 16 / #1944 / 0.002% |
| 1916 | 10 / #2642 / 0.001% |
| 1915 | 10 / #2541 / 0.001% |
| 1914 | 5 / #3513 / 0.001% |