The 1985 Pan Pacific Open was a women's tennis tournament played on indoor carpet courts in Tokyo, Japan that was part of the Category 4 tier of the 1985 Virginia Slims World Championship Series.

It was the 10th edition of the tournament and was held from 9 December through 15 December 1985.

Third-seeded Manuela Maleeva won her second consecutive singles title at the event.

[1] Manuela Maleeva defeated Bonnie Gadusek 7–6, 3–6, 7–5 Claudia Kohde-Kilsch / Helena Suková defeated Marcella Mesker / Elizabeth Smylie 6–0, 6–4