In the 2004–05 season, Asada was age-eligible for junior international competitions. She competed in the ISU Junior Grand Prix series, winning both of her events. At the Junior Grand Prix Final, she won gold with an overall score 35.08 points ahead of the silver medalist, Yuna Kim. Asada won the Japanese Junior National championships, ahead of her sister who took the silver medal, and qualified for the 2005 Junior Worlds.