The 2003 Toray Pan Pacific Open was a tennis tournament played on indoor hard 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 25 through February 2, 2003.
Lindsay Davenport defeated Monica Seles, 6–7(6–8), 6–1, 6–2
Elena Bovina / Rennae Stubbs defeated Lindsay Davenport / Lisa Raymond, 6–3, 6–4