[1] Koyuki appeared in Kiyoshi Kurosawa's 2001 film Pulse.

[1][2] She rose to fame in the drama Kimi wa Petto (2003) with Jun Matsumoto and gained huge popularity.

[1] Her first international film was The Last Samurai (2003) where she played Taka, wife of a Samurai slain by the character Nathan Algren, portrayed by Tom Cruise.

[1][3] She has appeared in many commercials, including Coca-Cola Japan's Sokenbicha, P&G Max Factor SK-II, and Suntory Kakubin.

[1] In 2011, Koyuki married actor Kenichi Matsuyama, who co-starred with her in Kamui Gaiden.