She was the 2007 World Indoor Women's Recurve Champion in the competition held in Izmir, Turkey that year.

[2][3] At the 2008 Summer Olympics in Beijing Hayakawa finished her ranking round with a total of 649 points.

This gave her the 9th seed for the final competition bracket in which she faced Elena Mousikou in the first round, beating the archer from Cyprus with 112-103.

In the second round she was too strong for Jennifer Nichols with 105-103 and via Naomi Folkard with 106-97 she reached the quarter-finals.

[4] Together with Sayoko Kitabatake and Yuki Hayashi she also took part in the team event.