Yasuhiro Koseki blew away the field to win the men's 200-meter breaststroke at the Japan Open swimming tournament on Sunday.

Koseki touched home at Tokyo Tatsumi International Swimming Center in 2 minutes, 8.34 seconds at the meet that doubled as a qualifier for this fall's Asian Games in Incheon, South Korea. Akihiro Yamaguchi was a distant second in 2:10.48.

Two-time Olympic double gold medalist Kosuke Kitajima failed to reach the final and finished back in 13th place.

Ryosuke Irie won the men's 200 backstroke in 1:54.63 followed by Hayate Matsubara in second, a full 2.5 seconds back.

Hirofumi Ikebata took the men's 100 butterfly in 51.89, while Kosuke Hagino came second in 52.11. Natsumi Hoshi and Rie Kaneto claimed victories in the women's 100 butterfly and 200 breaststroke in 58.56 and 2:22.73, respectively.