By Hideki Mochizuki, Swimming World Japanese correspondent
NAGAOKA, Niigata, Japan, September 12. MISAKI Yamaguchi lowered the Japanese record in the women's 100 free during the second day of the Japan National Sports Festival held in Nagaoka.
Yamaguchi clocked a time of 54.43 to break the Japanese record of 54.88 previously set by Haruka Ueda at the World Championships.
Meanwhile, Ryosuki Irie downed Junya Koga, 52.37 to 52.87, in the men's 100 back finale.
"To win the race was important," Irie said. "With this time, I could come into play in the 100 at the global level."
Irie finished fourth at the World Championships in Rome with a 52.73, falling to Koga's winning time of 52.26.
Other individual winners were:
* A= Junior and senior highschool, B=senior at Junior high and freshmen at high school
400 IM (A): Yosuke Mori, 4:14.82
100 free: Ranmaru Harada, 49.39
100 back (B): Kosuke Hagino, 55.64
100 free (A): Junpei Miyamoto, 50.75
100 back: Ryosuke Irie, 52.37
50 free (B): Takuya Ishizaki, 23.41
200 butterfly (A): Yuta Kimura, 1:55.60
100 breast: Ryo Tateishi, 1:00.23
400 IM (A): Miho Takahashi, 4:40.41
100 free: Misaki Yamaguchi, 54.43 New Japanese record
100 back (B): Mai Harada, 1:01.01
100 free (A): Shoko Tanabe, 55.45
100 back: Aya Terakawa, 59.90
50 free (B): Miki Uchida, 25.90
200 butterfly (A): Yui Miyamoto, 2:06.73
100 breast: Satomi Suzuki, 1:06.67