Tina Yuzuki, also known as Rio, is a Japanese actress, singer and former AV idol who debuted as an AV actress in 2005, appearing in videos produced by the Max-A and S1 studios. After starring in AVs in various genres during her first year in the industry, she won an industry award as Best New Actress for 2006.[3] Since late 2007, she has used the stage name of Rio. In 2009, she transferred to IdeaPocket and became one of the studio's most prominent actresses. After a career that spanned over a decade and nearly 500 adult films, she retired in January 2016.

Tina Yuzuki was born in Tokyo on October 29, 1986. Her mother is Portuguese and her father is Japanese. She learned to speak Portuguese from her mother.

Yuzuki made her adult video debut at age nineteen in the November 2005 release for Max-A's Calen label, Hot Wind, The director of Yuzuki's premier video uses the name 'Toshio' and he continued to work with the actress in many of her early videos. Another collaboration between Yuzuki and director Toshio was in the March 2007 Max-A release, High School Uniform and Machine-Gun. Yuzuki continued appearing in videos for Max-A about once a month throughout 2006 and 2007. For her early work, Yuzuki was named the Best New Actress at the 2006 AV Actress Grand Prix awards.

In September 2007, Yuzuki announced in her official blog that she was changing her stage name from Tina Yuzuki to Rio and was starting a new blog under that name. In October 2007 Max-A released Endless Ecstasy Fuck under the name Rio. After spending two years making videos exclusively for Max-A, Yuzuki began performing for S1 No. 1 Style, part of Japan's largest porn company, the Hokuto Corporation, as early as February 2008 with the release of Risky Mosaic Rio, directed by Hideto Aki. She continued working for S1, producing one video per month, through the beginning of 2009 when she once again began performing for Max-A.

Yuzuki was given the Best Actress Award at the 2008 Adult Broadcasting Awards for appearances on the Cherry Bomb adult TV channel on SKY PerfecTV! satellite television. In addition, her November 2008 film, Double Risky Mosaic, Rio & Yuma, with Yuma Asami, was the S1 studio's entry in the 2009 AV GrandPrix contest. The video took the top GrandPrix Award and also won in several other categories: DVD Sales, Retailers Award, Package Design, and Best Featured Actress Video.

In another entertainment area, Yuzuki along with other S1 actresses was a regular on the late night TV variety show Please Muscat.

Yuzuki was a member of the Ebisu Muscats.

Rio began making videos for the AV studio IdeaPocket in March 2009 with the release of Rio's Everyday Carnival directed by Tadanori Usami.

Rio appeared in her first mainstream movie in 2009, starring in the schoolgirl prostitute revenge erotic thriller Stop the Bitch Campaign, directed by Kosuke Suzuki with Kenichi Endō as the villain. The film, the third in the series, debuted at the Yubari International Fantastic Film Festival in February 2009, followed by a series of screenings in March at the Cinema Rosa in the Ikebukuro district of Tokyo. A DVD was released in June 2009.