松山ケンイチ
On 24 November 2008, it was announced that a film was to be produced that involved both American and Japanese actors and staff, with Maki Horikita and Kenichi Matsuyama in the lead roles. The director of the film was Hans Canosa, who had been active in American films. The script was written by Gabrielle Zevin, the author of the novel "Memoirs of a Teenage Amnesiac", on which the film was based on. When the film was announced, it was given the working title of "Lost Memories". Filming began on 26 November 2008 and ended in early January 2009.