Because of the isolated nature of the country, information—particularly unbiased information—on North Korean cinema is difficult to find. Outsider appraisal of North Korean cinema is often condescending, while statements from official North Korean sources include claims like, "In recent years our film art has created an unprecedented sensation in the world's filmdom... The revolutionary people of the world are unstinting in their praise of this feature film and other monumental works, calling them 'the first-class films by international standards', 'the most wonderful movies ever produced' and 'immortal revolutionary and popular films'."
North Korea's principal producer of feature films is the Korean Film Studio, a state-run studio of about 10 million square feet (930,000 m²) founded in 1947 and located outside of Pyongyang. Other North Korean film studios include the Korean Documentary Film Studio (founded in 1946), the April 25 Film Studio of the Korean People's Army (founded in 1959 and previously known as the February 8 Cinema Studio) and the Korean Science and Educational Film Studio (founded in 1953 and also known as the April 26 Children's Film Production House, and Science Educational Korea, or SEK.) These studios produce feature films, documentaries, animated films, children's films and science films. According to a report from 1992, the Korean Feature Film Studio produced about forty films per year, while the other studios together accounted for another forty.
In addition to animation for the North Korean domestic market, SEK has become a resource for international animation, including some well-known American animated films. Production costs in North Korea are very low, and the quality of animators is well perceived. SEK has done work on such productions as Mondo TV's animated series Pocahontas and King Lion Simba (not the Walt Disney feature films), the science fiction epic Light Years, and Empress Chung.
North Korean leader Kim Il-sung believed in Lenin's maxim: "Cinema is the most important of all arts." Accordingly, since the country's division, North Korean films have often been used as vehicles for instilling government ideology into the people. A common theme is martyrdom for the nation. The film Fate of a Self-defence Corps Member, based on a novel written by Kim Il-sung during the fight against the Japanese occupation reflects this theme, as does the highly regarded film, Sea of Blood (1969). The latter film comes from a novel telling the story of a woman farmer who becomes a national heroine by fighting the Japanese.