Total babies named Kazuko (all years): 398
| Year | Girls (count / rank / %) |
|---|---|
| 1945 | 5 / #4902 / 0.000% |
| 1944 | 6 / #4295 / 0.000% |
| 1942 | 5 / #4984 / 0.000% |
| 1941 | 6 / #4193 / 0.001% |
| 1938 | 11 / #2662 / 0.001% |
| 1937 | 8 / #3299 / 0.001% |
| 1935 | 12 / #2501 / 0.001% |
| 1934 | 8 / #3313 / 0.001% |
| 1933 | 13 / #2333 / 0.001% |
| 1932 | 21 / #1724 / 0.002% |
| Year | Girls (count / rank / %) |
|---|---|
| 1931 | 19 / #1833 / 0.002% |
| 1930 | 14 / #2370 / 0.001% |
| 1929 | 20 / #1857 / 0.002% |
| 1928 | 28 / #1524 / 0.002% |
| 1927 | 63 / #958 / 0.005% |
| 1926 | 14 / #2526 / 0.001% |
| 1925 | 15 / #2437 / 0.001% |
| 1924 | 16 / #2368 / 0.001% |
| 1923 | 20 / #1985 / 0.002% |
| 1922 | 14 / #2548 / 0.001% |
| Year | Girls (count / rank / %) |
|---|---|
| 1921 | 11 / #3042 / 0.001% |
| 1920 | 13 / #2666 / 0.001% |
| 1919 | 17 / #2117 / 0.002% |
| 1918 | 21 / #1844 / 0.002% |
| 1917 | 5 / #4947 / 0.000% |
| 1916 | 8 / #3414 / 0.001% |
| 1915 | 5 / #4613 / 0.001% |