Tetsuwan Atomu, known internationally as Astro Boy, is a pioneering anime series based on the manga by Osamu Tezuka. It follows the adventures of a powerful robot boy named Atom, created by Dr. Tenma after the loss of his son. Atom possesses human emotions and strives to coexist with humans, often facing challenges that explore themes of technology, ethics, and humanity. The series is considered a classic and has had a significant influence on the development of anime as a genre.