Ichiro Yamashiro

Ichiro Yamashiro is the father of Masako Yamashiro and also had a son who was a popular samurai. The son was killed by the shogun because of jealousy. Ichiro lived out the rest of his live as a doctor living together with his daughter.

Ichiro healed Citizen Steel when he traveled back in time and also inspired Atom. When Atom asked Ichiro what his family's surname was, it was revealed that they are ancestors to the hero Katana. (episode: Shogun)