(born December 28, 1987, in Yao, Osaka, Japan) is a gravure model, model and race queen, former member of Japanese idol pop group v-u-den that was associated with Hello! Project. She remained within the group until its disbandment in 2008, after which point she was contracted with Up-Front Agency. She is currently no longer in the entertainment business, having retired to study beauty. Two months later, in August, she was put into a group with Morning Musume member Rika Ishikawa and sole "Hello! Project Shin Unit Audition" winner Erika Miyoshi. Their debut single, "Koi no Nukegara", was released on September 23.
In January 2006, she was added to the new Hello! Project kickball team Metro Rabbits H.P. Her debut photobook, photographed in Okinawa and titled "I Doll" (a pun on "Idol"), was released in February, with the DVD released the following month. Okada was cast in the film Sukeban Deka: Codename Saki Asamiya as Tae Konno, released on September 30, 2006.
In 2008, it was announced that V-u-den would disband after their June concert tour. Her activities as a singer ceased, and she began to do gravure work, as well as appearing on variety shows.
On March 31, 2009, Okada graduated from Hello! Project along with the entire Elder Club, as part of a mass graduation. She also appeared at the Elder Club's final concert together the month before. She did, however, remain with Up-Front Agency, transferring to the Kansai division and moving to Osaka. On June 23, 2010, she announced her intent to retire from celebrity life. Her contract with Up-Front Kansai was terminated on June 30.