10 october, 1984
She was born in Tsuchiura, Ibaraki. Chiaki was a popular model during Japan's child model boom in the mid-1990s. In 1997, she appeared in the photobooks Shinwa-Shōjo (Girl of Myth) and Shōjokan (Girl's Residence), photographed by Kishin Shinoyama. Shinwa-Shōjo became a best-seller but, as it contained some nudity, was discontinued by the publisher in 1999 after the institution of new anti–child pornography laws. She also posed as a model for the child fashion magazines Nicola (1997–2001) and Pichi Lemon (1996–2001).
She first achieved widespread recognition as an actress in Japan for her starring roles in the horror films Shikoku (1999) and Ju-on (2000). Chiaki also appeared in the action film Battle Royale (2000) as Takako Chigusa.
Following feature appearances on several notable Japanese television programs (including Rokubanme no Sayoko), Chiaki made her Hollywood debut in director Quentin Tarantino's 2003 film Kill Bill, Volume I as Gogo Yubari, the schoolgirl bodyguard of yakuza boss O-Ren Ishii (Lucy Liu). She has stated that she is in the process of learning English and hopes to play more English-language roles in the future.
Chiaki's other film appearances include major roles in the samurai drama Azumi 2: Death or Love and Takashi Miike's Yōkai Daisensō.
In 2010, she released the CD single "Ryūsei no Namida" on DefStar Records as "CHiAKi KURiYAMA". The song was used as the first ending theme for Mobile Suit Gundam Unicorn. This single was followed by three others under her name as traditionally written in Japanese: "Kanōsei Girl", "Cold Finger Girl", and "Oisihi Kisetsu/Ketteiteki Sanpunkan"; "Cold Finger Girl" was used as the opening for the anime adaptation of Level E. She followed the singles with an album, Circus, in 2011