Total babies named Yukio (all years): 427
| Year | Boys (count / rank / %) |
|---|---|
| 1939 | 5 / #3965 / 0.000% |
| 1935 | 6 / #3640 / 0.001% |
| 1934 | 11 / #2391 / 0.001% |
| 1933 | 9 / #2737 / 0.001% |
| 1932 | 16 / #1921 / 0.002% |
| 1931 | 22 / #1537 / 0.002% |
| 1930 | 18 / #1820 / 0.002% |
| 1929 | 27 / #1412 / 0.003% |
| 1928 | 22 / #1646 / 0.002% |
| 1927 | 17 / #2031 / 0.002% |
| Year | Boys (count / rank / %) |
|---|---|
| 1926 | 21 / #1719 / 0.002% |
| 1925 | 28 / #1424 / 0.003% |
| 1924 | 19 / #1893 / 0.002% |
| 1923 | 26 / #1501 / 0.002% |
| 1922 | 36 / #1220 / 0.003% |
| 1921 | 18 / #1979 / 0.002% |
| 1920 | 20 / #1818 / 0.002% |
| 1919 | 23 / #1574 / 0.002% |
| 1918 | 15 / #2164 / 0.001% |
| 1917 | 26 / #1395 / 0.003% |
| Year | Boys (count / rank / %) |
|---|---|
| 1916 | 19 / #1697 / 0.002% |
| 1915 | 12 / #2307 / 0.001% |
| 1914 | 6 / #3260 / 0.001% |
| 1913 | 5 / #3256 / 0.001% |