Kato clocked 56.91 seconds, 0.10 seconds off the previous record set by Ayako Doi in 2008, in winning the women's 100-meter butterfly, while Terakawa won the 50 backstroke in 26.32, 0.08 off her own record.
In men's action, 100 backstroke world gold medalist Junya Koga won the 100 individual medley in 54.75.