Yonee has been practicing quadrupedal running for about nine years. He first became interested in running on his hands and feet in his second year of junior high school, when a science teacher said, "Animals that run on all fours are fast." Those words stuck with him. "If I master four-legged running, I might even be able to beat overseas athletes in the 100 meters," he said he thought at the time. He was confident in his physical abilities, having played on the school soccer team. He trained almost daily on a mountain trail to Yonago Castle and on local beaches.