| Seiko Shimakage | |
| Birth Date: | 16 February 1949 |
| Birth Place: | Sakata, Japan |
| Medaltemplates-Expand: | yes |
| Medaltemplates-Title: | Medal record |
is a Japanese former volleyball player who competed in the 1972 Summer Olympics.
She was born in Sakata.
In 1972 she was part of the Japanese team which won the silver medal in the Olympic tournament. She played all five matches.