Arakawa was the senior national Japanese champion in both 1998 and 1999. She made her Olympic debut when she represented Japan in the 1998 Winter Olympics in Nagano at age 16. The Emperor and Empress of Japan attended the ladies' free skate event. She placed 13th at the Nagano Olympics. At that time, she was ranked number 2 in Japan. In 2002, Arakawa finished second at Japan's national championships and, as a result, was not named to the Japanese 2002 Winter Olympics team.