Hayashi participated in the 2002 Winter Olympics in Salt Lake City. The team took eighth place.
Hayashi was also part of the Japanese curling Olympic team at the 2006 Winter Olympics in Turin. She played in the position of third alongside her teammates Skip Ayumi Onodera , Second Mari Motohashi , Lead Moe Meguro and Alternate Sakurako Terada . The team took seventh place. Onodera and Motohashi are also from Tokoro.