Tina Yuzuki also known as Rio, is a Japanese AV idol who debuted in 2005 and quickly rose to stardom. Known for her chirpy character and cute antics, she has in a short time become one of the most productive actresses in the Japanese adult video industry. She has appeared in videos produced under the Max-A and S1 labels. After starring in AVs in various genres during her first year in the industry, in December 2006 she was called, "the most talked about actress this year," and the Japanese AV industry named her Best New Actress for 2006. Since late 2007, she has used the stage name of Rio.

Yuzuki stands out in the AV field, where an average career spans about a year, with five to ten videos total, while since her AV debut Yuzuki has appeared in one or two video releases per month for more than three years. The Japanese AV industry recognized Yuzuki by naming her the Best New Actress at the 2006 AV Actress Grand Prix awards.She was further honored by being crowned Best Actress at the 2008 Adult Broadcasting Awards for 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.