| 2003 Toray Pan Pacific Open | |
|---|---|
| Date | January 28 – February 2 |
| Edition | 20th |
| Category | Tier I |
| Surface | Carpet / indoor |
| Location | Tokyo, Japan |
| Venue | Tokyo Metropolitan Gymnasium |
| Champions | |
| Singles | |
 Lindsay Davenport | |
| Doubles | |
 Elena Bovina /  Rennae Stubbs | |
The 2003 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts. It was the 20th edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2003 WTA Tour. It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 28 through February 2, 2003. Lindsay Davenport won the singles title.