Acting
When movies began to open up for him, Shigeta took acting lessons from seasoned dialogue coach Leon Charles.
Shigeta first came on screen in the U.S., in 1959 as Detective Joe Kojaku in The Crimson Kimono, a detective story that featured an interracial romantic triangle between Kojaku, his partner Sgt. Charlie Bancroft (played by Glenn Corbett), and Christine Downes (portrayed by Victoria Shaw). Shigeta's character was groundbreaking for the 1950s, an Asian-American detective played by an Asian-American actor with regular American speech patterns, rather than a non-Asian made up to pass as Asian who speaks in broken English.
Paramount Pictures and James Clavell cast Shigeta in the 1960 release Walk Like a Dragon, as Cheng Lu, a young Chinese man in the American old west who resents that Chinese must be subservient to white people. When filming began, Shigeta was still starring in Holiday in Japan in Las Vegas. An arrangement was made to transport him after his last show to the Paramount studio by ambulance to make sure he arrived on time. The technical advisor to Shigeta on the film was Benson Fong, who taught Shigeta how to mount a horse Chinese style. Jack Lord has first billing in this movie, which pits Shigeta against Lord for the affections of Kim Sung, played by Nobu McCarthy. Shigeta and McCarthy would work together again in the 1965 Perry Mason episode, "The Case of the Wrongful Writ," while Shigeta and Lord would work together in the 1968 Hawaii Five-O episode "Deathwatch".
The 1961 romantic comedy Cry for Happy had Shigeta co-starring with Glenn Ford, Donald O'Connor and Miyoshi Umeki in a tale about Korean War era United States Navy photographers in Japan.
In 1961, Shigeta was cast as Wang Ta, a role originated by Ed Kenney on Broadway, in the Academy Award-nominated movie version of Rodgers and Hammerstein's Flower Drum Song with Nancy Kwan and Miyoshi Umeki playing the love interests.
He was cast as World War II Japanese diplomat Hidenari Terasaki opposite Carroll Baker as Gwen Terasaki in the 1961 biographical movie Bridge to the Sun. A rarity for its era, the movie told the true story of a racially mixed marriage set against the background of the war between the United States and Japan.
Shigeta guest starred in many television shows, beginning with Alcoa Premiere in 1961, as a Korean War era Chinese Communist who tortured star Lloyd Bridges. He continued to act in television up through Avatar: The Last Airbender in 2005.
In 1965, Shigeta starred in Paradise, Hawaiian Style with Elvis Presley.
In 1965, Shigeta worked with Raymond Burr in the Perry Mason episode "The Case of the Wrongful Writ", cast as lawyer Ward Toyama who finds himself as the defendant. Shigeta worked with Raymond Burr two more times, in the 1969 Ironside episode "Love My Enemy", and the 1971 episode "No Motive for Murder" of the same series.
From 1969 to 1972, Shigeta had recurring appearances on the TV hospital drama Medical Center, in which he alternately appeared as the Resident Doctor and Doctor Osaka, for seven episodes. He played the role of Chief Resident in the series 1969 2-hour pilot U.M.C.
In 1974, Emergency!. He is known for playing the character in the episode "Foreign Trade," where he offers Dixie a promotion to nursing supervisor.
He also continued starring in films. In 1976, he portrayed the famous Japanese admiral Chūichi Nagumo in Midway. In 1988, he played the ill-fated corporate executive Joe Takagi in the action film Die Hard. Cage II: The Arena of Death from 1994 pits star Lou Ferrigno against Shigeta's character of underworld crime boss Tim Yum Yum. Shigeta lent his voice to Disney's 1998 animated film Mulan.