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The 1973 Fred Perry Japan Open Tennis Championships was a combined men's and women's tennis tournament played on outdoor hard courts and took place in Tokyo, Japan. The tournament was held from 8 October through 14 October 1973. The men's events were part of the 1973 Commercial Union Assurance Grand Prix circuit and graded as B category whereas the women's competition was a non-tour event. Ken Rosewall won the men's singles title, earning him the $12,000 first prize, while Evonne Goolagong won the women's singles event and received $5,000.
Ken Rosewall
Helga Niessen Masthoff, 6–3, 6–4