Osamu Tezuka’s creation “Mighty Atom” became “Astro Boy” in America. Along with Bob Clampett’s “Beany & Cecil,” Astro was the TV cartoon that influenced me the most as a kid.
A Tezuka cartoon that didn’t appear in America was the astounding and disturbing “Dororo.” The story is as medieval as Astro is futuristic. The premise of Astro is dark, being the death of a little boy, and Dororo takes an even darker twist. It begins with the birth of a horribly deformed baby boy.
https://youtu.be/bbbHrOK6xfc
The complete original Dororo series on DVD currently costs $50 on Amazon, but Dororo was recently remade and it’s available on Amazon Prime.