Yoko Mitsuya is a Japanese gravure idol and actress.

Mitsuya was born in Tokyo but moved to Saitama shortly after she was born. She began practicing ballet as a first grader; her dream was to become a ballerina. When she was in sixth grade, she applied for the Horipro Talent Scout Caravan and was awarded a prize for her excellent work. From there, she made her debut in the photobook Baby Kiss (and was photographed alongside such idols as Yoshii Rei and Omori Reiko). Around this time, future actresses Fukada Kyoko and Sakai Ayana were also making their debuts. (Ayana was also part of the Baby Kiss photobook.)

Even though Mitsuya was now aiming to become an actress, because of her large bust size for her age, she began doing gravure work at a steady pace. Her body size (especially her bust) was considered more mature than her age at that time. For that, she had been in several publications and photobooks by the time she was 15, and was chosen as the Visual Queen of the year for 2000. Because of her bust size and overall body appearance, Mitsuya was considered chubby and this pressured her to crash diet when she was 16. As a result of this she lost not only centimeters from her chest, but her new size was a turn-off when wearing swimsuits.

During this time Yoko Mitsuya stopped gravure work. Furthermore, since her dream of becoming an actress was being deterred due to her gravure work, she considered leaving Horipro and even sent a resume to Starbucks (it can be assumed she was rejected).

She made a comeback when she was 18 by wearing lingerie. This not only surprised her fans, it impressed them because it was considered a sexier and more obscene pose. Finally, Yoko got to become an actress with her first movie being 69 ~ Sixty Nine.

In 2004, she appeared in the Kamen Rider Blade movie, Missing Ace as Kamen Rider Larc.

In 2005 she appeared in Gekkan photobook, posing (almost) naked. (with only her hand covering her nipples and vagina). This made people think that the rumor that she would soon become an AV actress was true.

In 2006 she played in a live action movie of Tatsuya Egawa's (semi hentai manga)Tokyo Daigaku Monogatari, with, of course, a yoko nudity scene in it. By the time she played the movie, people already knew her as an infamous "E-cup" Japanese actress/model.

Her latest movie is a ("Electra" like) super hero movie called "Cool Dimension". She finally plays as a leading actress; in fact she is the super hero in the movie.

* Birth Name: 三津谷 葉子 (Mitsuya Yōko)
* Birthdate: November 8th, 1984
* Birthplace: Tokyo, Japan
* Blood type: O
* Height: 165cm
* Bust: 87cm (E cup)
* Waist: 60cm
* Hips: 88cm
* Shoe size: 25cm