The Eternal Zero is a 2013 Japanese historical war film directed, co-written, and with visual effects by Takashi Yamazaki. Based on the eponymous 2006 novel by Naoki Hyakuta, the film starts with a frame story set in 2004, where a Japanese man in his twenties learns that he is the grandson of a kamikaze military aviator who died in World War II, and then investigates the life story of his grandfather. The Eternal Zero was released in Japan on 21 December 2013, by Toho. The film grossed over ¥8.76 billion, becoming the highest-grossing Japanese film of 2014.