The 1994 Japan Open Tennis Championships was a combined men's and women's tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo in Japan that was part of the Championship Series of the 1994 ATP Tour and of Tier III of the 1994 WTA Tour. The tournament was held from 4 April through 11 April 1994. Pete Sampras and Kimiko Date won the singles titles.

Finals

Men's singles

🇺🇸 Pete Sampras defeated 🇺🇸 Michael Chang 6–4, 6–2

Women's singles

🇯🇵 Kimiko Date defeated 🇺🇸 Amy Frazier 7–5, 6–0

Men's doubles

🇸🇪 Henrik Holm / 🇸🇪 Anders Järryd defeated 🇨🇦 Sébastien Lareau / 🇺🇸 Patrick McEnroe 7–6, 6–1

Women's doubles

🇯🇵 Mami Donoshiro / 🇯🇵 Ai Sugiyama defeated Yayuk Basuki / 🇯🇵 Nana Miyagi 6–4, 6–1