The 1999 Toyota Princess Cup was a women's tennis tournament played on outdoor hard courts in Tokyo, Japan. It was part of Tier II of the 1999 WTA Tour. It was the third edition of the tournament and was held from 20 September through 26 September 1999. First-seeded Lindsay Davenport won the singles title and earned $80,000 first-prize money.[1] [2] [3] [4]
| Country | Player | Rank | Seed | |
|---|---|---|---|---|
 United States | Lindsay Davenport | 2 | 1 | |
| United States | Monica Seles | 5 | 2 | |
 France | Julie Halard-Decugis | 8 | 3 | |
| Amanda Coetzer | 9 | 4 | ||
| France | Amélie Mauresmo | 14 | 5 | |
 Spain | Conchita Martínez | 16 | 6 | |
| United States | Amy Frazier | 22 | 7 | |
 Japan | Ai Sugiyama | 28 | 8 |
The following players received wildcards into the singles main draw:
The following players received wildcards into the doubles main draw:
The following players received entry from the singles qualifying draw:
The following players received entry as lucky losers:
The following players received entry from the doubles qualifying draw:
See main article: 1999 Toyota Princess Cup – Singles. Lindsay Davenport defeated Monica Seles, 7–5, 7–6(7–1)
See main article: 1999 Toyota Princess Cup – Doubles. Conchita Martínez / 
Patricia Tarabini defeated Amanda Coetzer / 
Jelena Dokić, 6–7(7–9), 6–4, 6–2
