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.