| 2004 Toray Pan Pacific Open | |
|---|---|
| Date | January 30 – February 8 |
| Edition | 21st |
| Category | Tier I |
| Surface | Carpet / indoor |
| Location | Tokyo, Japan |
| Venue | Tokyo Metropolitan Gymnasium |
| Champions | |
| Singles | |
 Lindsay Davenport | |
| Doubles | |
 Cara Black /  Rennae Stubbs | |
The 2004 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts. It was the 21st edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2004 WTA Tour. It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 30 through February 8, 2004. Lindsay Davenport won the singles title.