Shizumanu Taiyō (沈まぬ太陽) (lit. The Never-setting Sun) is a 2009 Japanese film directed by Setsurō Wakamatsu. It is also known as The Unbroken in the United States. Shizumanu Taiyō is based on a novel by Toyoko Yamasaki which centers on Hajime Onchi, an employee of "NAL," a large national airline. The first part of the novel focuses on Onchi's activity as the chairman of the employees' union in the 1960s; his reward for fighting for better working conditions for the staff is a series of postings abroad, to Pakistan, Iran, and finally Kenya, a destination to which the company does not even fly. The second and third parts of the novel take place in 1985 and chronicle the crash of a jumbo jet and its aftermath within the company.