The 1975 Japan Open Tennis Championships was a combined men's and women's tennis tournament played on hard courts. The men's events were part of the 1975 Commercial Union Assurance Grand Prix and took place at the Denen Coliseum in Tokyo, Japan. The tournament was held from 2 November through 8 November 1975. Raúl RamÃÂrez and Kazuko Sawamatsu won the singles titles.
Raúl RamÃÂrez defeated Manuel Orantes 6âÂÂ4, 7âÂÂ5, 6âÂÂ3
Kazuko Sawamatsu defeated Ann Kiyomura 6âÂÂ2, 3âÂÂ6, 6âÂÂ1
Brian Gottfried / Raúl RamÃÂrez defeated Juan Gisbert Sr. / Manuel Orantes, 7âÂÂ6, 6âÂÂ4
Ann Kiyomura / Kazuko Sawamatsu defeated Kayoko Fukuoka / Kiyomi Nomura 6âÂÂ2, 6âÂÂ3