The 1985 Japan Open Tennis Championships (also known as the 1985 Japan and Asian Open Tennis Championships) was an Grand Prix tournament held in Tokyo, Japan. The tournament was held from 14 to 20 October 1985 and was played on outdoor Hard courts.
Scott Davis defeated Jimmy Arias 6–1, 7–6
Gabriela Sabatini defeated Linda Gates 6–3, 6–4
Scott Davis / David Pate defeated Sammy Giammalva Jr. / Greg Holmes 7–6, 6–7, 6–3