What roles does violence and brutality play in the Japanese identity according to hillenbrand

Hillenbrand, an American author gives accounts of Japanese identity during World War II within her book Unbroken: A World War II Story of Survival. According to Hillenbrand, the Japanese believed themselves to it to be their divine right and destiny to be the superior race of Asia and establish their culture and territories across Eastern Asia and the Pacific. This is due to the fact that the Japanese have never lost a war with a foreign power, going all the way back to the 13th century when the Mongols launched two failed invasions on the Japanese islands.