Fuji TV in the context of Flagship (broadcasting)

Princess Knight, also known as Ribon no Kishi, is a Japanese manga series written and illustrated by Osamu Tezuka. This manga follows the adventures of Sapphire, a girl who was born accidentally with the blue heart of a boy and the pink heart of a girl. She pretends to be a prince to prevent the evil Duke Duralumin from taking over the kingdom through his son, Plastic. The gender-bending main character was inspired by the all-female musical theater group Takarazuka Revue in which women performed both female and male roles.

The story was ordered by an editor of Kodansha's magazine Shōjo Club who wanted Tezuka to produce a manga aimed towards a female audience that could replicate the success of his former boy-aimed stories. The author then created Princess Knight, originally serialized in that magazine from 1953 to 1956. The manga's popularity resulted into a radio dramatization in 1955, three other serializations between 1958 and 1968, and a 52-episode television anime series by Mushi Production that aired on Fuji TV from 1967 to 1968. It has also influenced several stage musicals since the 1980s and inspired remakes of the work by other authors.

Astro Boy (Japanese: 鉄腕アトム, Hepburn: Tetsuwan Atomu; "Mighty Atom", lit. "Iron Arm Atom") is a Japanese anime television series based on Osamu Tezuka's manga of the same name. It premiered on Fuji TV on New Year's Day, 1963 (a Tuesday) and is the first popular animated Japanese television series that embodied the aesthetic that later became familiar worldwide as anime. It lasted for four seasons, with a total of 193 episodes, the final episode presented on a Saturday, New Year's Eve 1966.

At its height it was watched by 40% of the Japanese population who had access to a TV. In 1964, there was a feature-length animated movie called Mighty Atom, the Brave in Space (鉄腕アトム 宇宙の勇者, Tetsuwan Atomu: Uchū no yūsha) released in Japan. It was compiled from three selected episodes from the series—episodes 46 ("The Robot Spaceship"), 56 ("Earth Defense Army") and 71 ("The Last Day of Earth"), respectively. The latter two were filmed and produced in color.