In 1986, she passed an audition hosted by CBS Sony and moved to Tokyo, becoming Okinawa Actors School's first graduate.
Gwinko released her debut album Yesterday Today Forever and single "Star Ship (I'm Going High)" in 1987.
She became known for her style of singing R&B with digital sound in the foreground with slightly husky and relaxed vocals, as well as her dance choreography reminiscent of that of Janet Jackson.
On the October 13 episode, Gwinko and Furutachi were witnesses to an incident when rock band The Timers played an unscheduled performance of a song protesting FM Tokyo censorship policies.
[2] In 1991, Gwinko released the single "Downtown Game", which was used as the opening theme of the anime series City Hunter '91.