K-20: Legend of the Mask is a 2008 Japanese action film written and directed by Shimako Satō and based on a novel by Sō Kitamura and its sequel. The film was released worldwide on December 20, 2008. Takeshi Kaneshiro and Takako Matsu portray a fictional role in the film. Tōru Nakamura and Kanata Hongo also starred in the film, just as Takeshi Kaga, Fumiyo Kohinata, Reiko Takashima, Toru Masuoka and Yuki Imai.

Takeshi Kaneshiro is a Japanese actor and singer based in Taiwan. Beginning his career as a pop idol, he has since moved his focus from music to film. Kaneshiro has worked with renowned directors throughout East Asia, including Wong Kar-wai, Peter Chan, Zhang Yimou and John Woo, resulting in collaborations that have achieved both commercial success and critical acclaim. Kaneshiro is also well known in the gaming industry for being the model and voice for the samurai character, Samanosuke Akechi, in Capcom’s Onimusha video game series.