is a retired Japanese judoka.
Moriwaki is from Kake, Hiroshima and began judo at the junior high school days.
When he was a member of judo club at , alongside Takao Kawaguchi and Yoshiharu Minami.
In 1974, When Moriwaki was a student of Kokushikan University, he won a gold medal at the World University Championships held in Brussels. He took office as the coach of Kokushikan University after graduation from there.
In 1979, Moriwaki won a bronze medal of World Championships held in Paris. He was also expected to get medal of Olympic Games in 1980 but he couldn't because the 1980 Summer Olympic Games was boycotted by the Japanese Government.
Moriwaki won a gold medal at the World Championships in 1981 at the age of 29.
, he coaches at Kokushikan Women's Judo Club.
Achievements 1970 - Inter-highschool championships (light weight) 1st 1974 - World University Championships (light weight) 1st 1975 - All-Japan Selected Championships (light weight) 3rd 1976 - All-Japan Selected Championships (light weight) 3rd 1976 - Kodokan Cup (-60 kg) 1st 1977 - All-Japan Selected Championships (-60 kg) 1st 1978 - Jigoro Kano Cup (-60 kg) 2nd 1978 - All-Japan Selected Championships (-60 kg) 3rd 1978 - Kodokan Cup (-60 kg) 2nd 1979 - World Championships (-60 kg) 3rd 1979 - All-Japan Selected Championships (-60 kg) 2nd 1979 - Kodokan Cup (-60 kg) 2nd 1980 - All-Japan Selected Championships (-60 kg) 1st 1981 - World Championships (-60 kg) 1st 1981 - All-Japan Selected Championships (-60 kg) 2nd
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