is a retired judoka who competed in the -60 kg division.

Biography

Koshino began learning judo with a local sports team while he was in elementary school, and became the Hokkaidō Prefecture champion for his weight class in junior-high school. He placed third in the inter-highschool tournament during his senior year, and entered Tōkai University

Tokai University

is a private university in Tokyo, Japan. It was established in 1943 by Shigeyoshi Matsumae, who had formerly been the engineering president of the Ministry of Communications...

 in 1985. He won the Shoriki Cup twice while attending the university, and joined the Toyo Suisan

Toyo Suisan

, or just , is a Japanese company specializing in ramen noodles. Toyo Suisan is headquartered in Minato, Tokyo. It owns the brand Maruchan and operates two companies in the United States: Maruchan, Inc. in Irvine, California and Maruchan Virginia, Inc. in Richmond, Virginia.It was established in...

 corporation after graduating. He won the Kodokan Cup for 4 consecutive years from 1989–1992 and All-Japan Weight Class Judo Championships for 3 consecutive years from 1989–1991, and placed second in the World Judo Championships

World Judo Championships

The World Judo Championships are the highest level of international judo competition, along with the Olympic judo competition. The championships are held once every year by the International Judo Federation, and qualified judoka compete in their respective categories as representatives of their...

 in 1989 before winning the world championships in 1991. He retired from competitive judo after finishing with a bronze medal at the 1992 Summer Olympics

1992 Summer Olympics

The 1992 Summer Olympic Games, officially known as the Games of the XXV Olympiad, were an international multi-sport event celebrated in Barcelona, Catalonia, Spain, in 1992. The International Olympic Committee voted in 1986 to separate the Summer and Winter Games, which had been held in the same...

. He became an instructor for the International Budo University

International Budo University

is a private university in Katsuura, Chiba, Japan, established in 1984. The University is specialized in budo and sports related education.- History :* International Budo University was established in 1984....

 in April, 1993.

See also

• List of judoka
• List of Olympic medalists in judo