Mitani is from Fukuyama, Hiroshima and began judo at the age of a first grader. He belonged to Japan Highway Public Corporation after graduation from Kinki University in 1991. Mitani was good at Ippon seoi nage, Osotogari and Uchi mata sukashi. In 1993, He won a gold medal at the Asian Championships held in Macau and at the East Asian Games held i...