1988 Suntory Japan Open Tennis Championships
Date	11–17 April
Edition	15th
Surface	Hard / outdoor
Location	Tokyo, Japan
Venue	Ariake Coliseum
Champions
Men's singles
John McEnroe[1]
Women's singles
Patty Fendick
Men's doubles
John Fitzgerald / Johan Kriek[2]
Women's doubles
Gigi Fernández / Robin White
← 1987 · Japan Open · 1989 →

The 1988 Suntory Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo in Japan that was part of the 1988 Nabisco Grand Prix and of the Category 2 tier of the 1988 WTA Tour. The tournament ran from 11 April through 17 April 1988. John McEnroe and Patty Fendick won the singles titles.

Finals

Men's singles

John McEnroe defeated Stefan Edberg 6–2, 6–2

• It was McEnroe's 1st title of the year and the 135th of his career.

Women's singles

Patty Fendick defeated Stephanie Rehe 6–3, 7–5

• It was Fendick's 4th title of the year and the 4th of her career.

Men's doubles

John Fitzgerald / Johan Kriek defeated Steve Denton / David Pate 6–4, 6–7, 6–4

• It was Fitzgerald's 3rd title of the year and the 20th of his career. It was Kriek's 2nd title of the year and the 22nd of his career.

Women's doubles

Gigi Fernández / Robin White defeated Lea Antonoplis / Barbara Gerken 6–1, 6–4

• It was Fernández's 1st title of the year and the 9th of her career. It was White's 1st title of the year and the 7th of her career.