Osamu Tezuka (Japanese: 手塚 治虫, born 手塚 治, Hepburn: Tezuka Osamu, 3 November 1928 – 9 February 1989) was a Japanese manga artist, cartoonist, and animator. Born in Osaka Prefecture, his prolific output, pioneering techniques, and innovative redefinitions of genres earned him such titles as “the Father of Manga”, “the godfather of manga” and “the god of manga”. Additionally, he is often considered the Japanese equivalent to Walt Disney, who served as a major inspiration during Tezuka's formative years. Though this phrase praises the quality of his early manga works for children and animations, it also blurs the significant influence of his later, more literary, gekiga works.

Tezuka began what was known as the manga revolution in Japan with his New Treasure Island published in 1947. His legendary output would spawn some of the most influential, successful, and well received manga series including the children mangas Astro Boy, Princess Knight and Kimba the White Lion, and the adult oriented series Black Jack, Phoenix, and Buddha, all of which won several awards.

Tezuka died of stomach cancer in 1989. His death had an immediate impact on the Japanese public and other cartoonists. A museum was constructed in Takarazuka dedicated to his memory and life works, and Tezuka received many posthumous awards. Several animations were in production at the time of his death along with the final chapters of Phoenix, which were never released.