Yuko Arimori (有森 裕子, Arimori Yūko, born December 17, 1966, in Okayama) is a Japanese professional marathon runner and a Goodwill Ambassador for the United Nations Population Fund (UNFPA).

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Yuko Arimori

Yuko Arimori in November 2008
Personal information
Full name	Arimori Yūko
Nationality	Japanese
Born	(1966-12-17) December 17, 1966 (age 57) Okayama, Japan
Height	1.65 m (5 ft 5 in)
Website	animo.aspota.jp
Sport
Country	Japan
Sport	Running
Event	Marathon
Former partner	Gabriel Wilson
Medal record Women's track and field 1992 Barcelona Marathon 1996 Atlanta Marathon

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Arimori competed for Japan in the 1992 Summer Olympics held in Barcelona, Spain in the marathon where she won the silver medal with a time of 2:32:49, eight seconds behind Russian Valentina Yegorova who ran the race in 2:32:41. This hard-fought race was the closest finishing time in Olympic history for men or women at that time. At the 1996 Atlanta Olympics, Arimori returned to the Olympic marathon, where she won the bronze medal and finished behind Valentina Yegorova for a second time. Yegorova ran the race in 2:28:05. Arimori's time was 2:28:39. Although both runners ran four minutes faster than their previous Olympic race, they were beaten back by Ethiopian runner Fatuma Roba, who completed the race and won the gold medal with a time of 2:26:05.

Arimori was the first woman granted professional status by the Japanese Amateur Athletic Federation (JAAF), the nation's governing track and field association. She was granted this status in 1996, following her second and final appearance at the Olympic Games in Atlanta.

Arimori was voted Japanese Athlete of the Year in 1992 and 1996.^[1]

Arimori was born on December 17, 1966, in Okayama, Okayama Prefecture, Japan.

Prior to the 1992 Olympics, Arimori participated in altitude training in Colorado.^[2] She married Gabriel Wilson in January 1998 in Boulder, Colorado, United States. They separated one month after their marriage, and Wilson revealed his extensive debts and previous homosexual tendencies, admitting "I was gay", at a press conference.^[3] They officially divorced in July 2011.^[4]

• Angkor Wat Marathon, a marathon introduced in 1996 by Yuko Arimori in Cambodia