| Kazumi Onishi | |
| Also Known As: | Kazumi Yamashita |
| Country: | Japan |
| Birth Date: | October 18, 1948 |
| Birth Place: | Osaka Prefecture, Japan |
| Retired: | 1972 |
is a Japanese former competitive figure skater. She is a four-time Japanese national champion and competed twice at the Winter Olympics, placing 14th in 1968 and 10th in 1972. She is an alumna of Kwansei Gakuin University.
| International | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Event | 66–67 | 67–68 | 68–69 | 69–70 | 70–71 | 71–72 | ||||||||||
| align=left | 14th | 10th | ||||||||||||||
| align=left | 18th | 11th | 16th | 13th | ||||||||||||
| align=left | 4th | |||||||||||||||
| align=left | bgcolor=cc9966 | 3rd | ||||||||||||||
| align=left | bgcolor=cc9966 | 3rd | ||||||||||||||
| National | ||||||||||||||||
| align=left | bgcolor=cc9966 | 3rd | bgcolor=cc9966 | 3rd | bgcolor=silver | 2nd | bgcolor=gold | 1st | bgcolor=gold | 1st | bgcolor=gold | 1st | bgcolor=gold | 1st |