The Eternal Zero (2013)
Original title: 永遠の0
The Eternal Zero is a 2013 Japanese-language war movie directed by Takashi Yamazaki, with a running time of 2h 24m. It stars Junichi Okada, Haruma Miura and Mao Inoue.
A brother and sister learn their biological grandfather was a kamikaze pilot who died during World War II. During their research into his life, they get conflicting accounts from his former comrades about his character and how he joined his squadron.