In March 2000, Takahashi earned a spot on Japan's Olympic women's marathon team after winning the Nagoya Women's Marathon in a time of 2:22:19. She went on to win the women's marathon at the 2000 Olympic Games in Sydney, with an Olympic record time of 2:23:14. It remained the fastest women's Olympic marathon until 2012 in London. Following her gold medal victory, Takahashi received the 2000 AIMS Best Marathon Runner Award as well as Japan's People's Honour Award.