Short answers, pulled from the story.
Dororo was written and illustrated by Osamu Tezuka. It was first serialized in Shogakukan's Weekly Shonen Sunday starting on the 27th of August 1967, and ran until the 22nd of July 1968, before being cancelled and concluded in Akita Shoten's Boken'o magazine in 1969.
Dororo follows Hyakkimaru, a ronin born without limbs or facial features after his father, daimyo Kagemitsu Daigo, made a pact with 48 demons. He travels through Sengoku era Japan slaying demons to reclaim his body parts, accompanied by a young orphaned thief named Dororo.
The English translation of the Dororo manga, released by Vertical Inc. in 2008, won the Eisner Award in the Best U.S. Edition of International Material, Japan division in 2009.
Two anime television series have been produced. The first, animated by Mushi Production, aired on Fuji TV for 26 episodes from April 6 to the 28th of September 1969. The second, produced by MAPPA and Tezuka Productions, aired for 24 episodes from January 7 to the 24th of June 2019.
The 1969 Dororo anime produced by Mushi Production is recognized as the first entry in what is now known as the World Masterpiece Theater series, which was called Calpis Comic Theater at the time of its original broadcast.
Sega developed a Dororo-based video game for the PlayStation 2, released in 2004. In the United States and Europe the game was published under the title Blood Will Tell.