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.
Finals
Singles
Manuela Maleeva defeated Bonnie Gadusek 7–6, 3–6, 7–5
It was Maleeva's 1st title of the year and the 6th of her career.
Doubles
Claudia Kohde-Kilsch / Helena Suková defeated Marcella Mesker / Elizabeth Smylie 6–0, 6–4