TOKYO — Japanese swimmers Reiko Nakamura and Yuko Nakanishi both set women's short-course world records at the Japanese national short-course championships today.

Nakamura clocked a time of 2 minutes, 3.24 seconds in the 200-meter backstroke final to shave .38 seconds off the previous record held by American Natalie Coughlin since 2001.

Nakanishi then took .41 seconds off Otylia Jedrzejczak's world mark when she clocked 2:03.12 in the 200-meter butterfly final. Poland's Jedrzejczak — the current world and Olympic champion in the event — finished 2:03.53 in Hungary in December.