Yuzo Kayama-san ,who is said to be best father, surprised me by his age. He is 70 years old this year! We might not believe it. According his friend, Kenichi Omae-san, Kayama-san often become interested in a lot of business, hobbies, sports, arts and so on, and moreover he blush up his skill to high level.. Besides he seems to enjoy them like innocent boy.
I am sure his challenging attitude is the reason why he looks young.