Emiko Okagawa (岡川恵美子, Okagawa Emiko, born 26 December 1964), later known as Emiko Sakaguchi (坂口恵美子 Sakaguchi Emiko) is a former professional tennis player from Japan.

Born in Tokyo, Okagawa reached a best singles ranking on the professional tour of 120 in the world.

Between 1983 and 1987 she played in four Federation Cup ties for Japan. In her debut tie she helped Japan progress through to the World Group second round, winning both a singles and doubles rubber in Japan's 2-1 win over Denmark.

Okagawa was a semi-finalist at the 1987 Singapore Women's Open and made the third round of the 1988 Australian Open.

In 1993, her final year on tour, she became Emiko Sakaguchi after getting married.^[1]

Result	No.	Date	Tournament	Surface	Opponent	Score
Win	1.	11 October 1987	Kofu, Japan	Hard	Rika Hiraki	6–2, 2–6, 6–1
Loss	2.	22 October 1988	Kuroshio, Japan	Hard	Misumi Miyauchi	4–6, 3–6
Loss	3.	25 June 1989	Madeira, Portugal	Hard	Akiko Gooden	2–6, 5–7
Win	2.	19 November 1989	Kyoto, Japan	Hard	Annika Narbe	6–3, 6–1
Win	3.	8 June 1992	Oliveira, Portugal	Hard	Karin Lušnic	6–2, 6–0

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Win	1.	13 November 1989	Kyoto, Japan	Hard	Naoko Sato	Ayako Hirose Miki Mizokuchi	1–6, 6–2, 6–1
Win	2.	22 June 1992	Leiria, Portugal	Hard	Yoriko Yamagishi	Hiroko Mochizuki Nancy van Erp	6–2, 7–5

• List of Japan Fed Cup team representatives

• Emiko Okagawa at the Women's Tennis Association
• Emiko Okagawa at the Billie Jean King Cup (archived)
• Emiko Okagawa at the International Tennis Federation