Tezuka's adventures of a child disguised in the body of an adult, The Marvelous Melmo (1970-72), began its serialization in First Grader in September 1970. The feature proved popular enough that in May 1971 it also began appearing in a sister-magazine known as Good Child, and would continue running in both until the series came to a close in March 1972. Originally known as Mama-chan, the series' name was changed in October 1971 due to a difficulty in securing a trademark.
As a tie-in to the Jungle Emperor (1965-66) television show, Leo the Lion Cub (1965-67), was simultaneously published on a monthly schedule by Shogakukan in both Kindergartener and First Grader from April 1965 to March 1967 and (presumably as the readership got older) in both Third Grader and Fourth Grader from May to November 1966.
Tezuka’s undersea adventure, Pippy (1951-53) was originally serialized in Shuiesha’s Fun Book from December 1951 to May 1953, with a one-off Pippy side-story, “Pippy’s Adventure”, appearing in an Fun Book “Special Issue” in August 1952.
Originally serialized in Sanrio's Lyrica magazine from November 1976 to March 1979, Tezuka's story about a magic little unicorn, Unico (1976-79) is best known manga series specifically aimed at children.
New Treasure Island (1947) is, by and large, considered Osamu Tezuka's debut work. It was first published in January 1947, when Tezuka was still a 19 year-old medical student, and although it was preceded by the "gag manga" strip, The Diary of Ma-chan (1946), it is Tezuka's first long-form "story manga".
Types of Tezuka Manga
Ongoing Serial: a series of episodes, published over a span of weeks/months/years where the story plot is connected from chapter to chapter and must be read in chronological order for it to be understood properly.
Chapter Serial: a series of episodes, published over a span of weeks/months/years where the story plot is self-contained to a single chapter. There may be an overarching plot, but the stories can generally be read in any order and be understood
Book: an all-in-one self contained story published as a one-off.
Supplement: an an all-in-one self contained story published as a stand-alone supplement to a regular weekly/monthly periodical.
Short Story: an all-in-one, self contained story that was published in a regular weekly/monthly periodical
Anthology: a collection of all-in-one, self contained stories that were published in a regular weekly/monthly periodical but are generally grouped together.