Yoshihiro Akiyama, a former judo fighter, has revealed his childhood. In the cable channel tvN 'Three Million Years Ago Wild Geographical exploration: Cave of Altamira' (hereinafter 'Cave of Altamira'), Park Hang-seo, Ahn Jung-hwan, Yoshihiro Akiyama, Kim Nam-il and Kim Dong-jun were gathered at the second camp site of Sondong Cave of Altamira. In the broadcast on this day, the production team told the Great circles, "There is a self-actualization activity today, and the theme is 'from a boy to an adult'," and explained, "I will take time to look back on my past and see how much more I have grown now than when I was a boy." Yoshihiro Akiyama said, "When we were young, our neighborhood was a very bad neighborhood. It was a really dangerous neighborhood, and most of our friends were yakuza." Park Hang-seo said, "But I was not tempted by that," and Yoshihiro Akiyama said, "The friends did not have the charm to be honest." Park Hang-seo said, "My father gave me exercise to keep my son from going bad," and Yoshihiro Akiyama said, "He raised me very strongly. I am here because of my father. " On the other hand, tvN 'Wild Geographical exploration: Cave of Altamira' is an unpredictable global 'Geographical exploration' entertainment program of Park Hang-seo, Ahn Jung-hwan, Yoshihiro Akiyama, Kim Nam-il and Kim Dong-jun,