Toyonaka, Osaka
Tezuka was born in Toyonaka, Osaka. He was the eldest of three children. The Tezuka family were prosperous and well-educated; his father Yutaka worked in management at Sumitomo Metals, his grandfather Taro was a lawyer, and his great-grandfather Ryoan and great-great-grandfather Ryosen were doctors. His mother's family had a long military history.