Born in San Diego, California, Yoshioka has started her career as an actress in the late 1960s. Following her appearance on Star Trek, she also worked on episodes of Mannix (1970, with John Wheeler), Laugh-In (1972, with Frank Welker), Anna and the King (1972, with Samantha Eggar, Keye Luke, and Brian Tochi), Banacek (1972, with Ned Romero, Kermit Murdock, Louise Sorel, Peter Brocco, and Bob Harks), The Magician (1974, with France Nuyen and Bob Harks and directed by Alexander Singer), Kung Fu (1975, with Keye Luke and Clyde Kusatsu), The Paper Chase (1978, with Earl Boen and Charles Hallahan), and Night Court (1984, with Karen Austin, John Larroquette, John Staible, Juan De Villa, and Tony Rocco).

Her appearance from Kung Fu was later re-used in the film version, Kung Fu: The Movie in 1986. Yoshioka had memorable appearances as Suzuki in Gaily, Gaily (1969, with Brian Keith, Harvey Jason, Peter Brocco, and Don Keefer), as Mai-Ling Chan in The Return of Charlie Chan (1973, with Louise Sorel), and as Sunny in Magnum Force (1973, with Mitchell Ryan, David Soul, and Wayne Grace). Other film work include Sweet Charity (1969, with Ricardo Montalban, Ben Vereen, John Wheeler, Jimmy Fields, Lance LeGault, and Buddy Joe Hooker), the television drama They Only Come Out at Night (1975, with Tim O'Connor and Barbara Luna), Swashbuckler (1976, with Genevieve Bujold, Sid Haig, Harry Basch, Henry Kingi, Sr.