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. ==Achievements==