 On 17 November 2010, Publisher Media Factory revealed that the English-language children's fantasy series "Magic Tree House" would be adapted into an anime film.Subsequently, in the 6 March 2011 issue of the "Asahi Shimbun" newspaper, an advertisement announced that the film would be released in Japanese cinemas in 2011.This children fantasy series sold more than 3.3 million copies in Japan, and 92 million copies in 33 different countries worldwide.