premise: Osamu Tezuka only has a father.
hypothesis: was a Japanese manga artist , cartoonist , animator , film producer , medical doctor and activist . Additionally , he is often considered the Japanese equivalent to Walt Disney , who served as a major inspiration during Tezuka 's formative years . Born in Toyonaka Tezuka took an interest in art and animation at an early age when his father showed him his first Disney films . As a young child Tezuka began to practice drawing so much that his mother would have to erase pages in his notebook in order to keep up with his output .