Tina Yuzuki, also widely known as Rio, was born on October 29, 1986, in Tokyo, Japan. She spent her early years in the bustling capital, growing up as an only child in a typical urban Japanese household. Her mother is Portuguese, which made her stand out, and she was often teased in school for being a foreigner. During her school years, she attended a private high school and later enrolled in a vocational college, though she did not complete her studies. Before entering the adult industry, she worked as a bartender and later as a gravure idol, a Japanese term for models who pose in bikinis or lingerie for photo books and magazines. Her ethnicity is Japanese and Portuguese.

Professionally, she is known as Tina Yuzuki or Rio, with Rio becoming her primary stage name after j...