Swimmer Kosuke Hagino booked his berth in this summer's FINA World Aquatics Championships after winning his third consecutive men's 400-meter freestyle title at the national championships in Tokyo on Tuesday.

Hagino clocked a time of 3 minutes, 45.19 seconds at Tokyo Tatsumi International Swimming Center to surpass the necessary qualifying standard for a spot at the worlds in Kazan, Russia, from July 24 to Aug. 9.

Yasuhiro Koseki (1:00.03) and two-time Olympic double gold medalist Kosuke Kitajima (1:00.31) booked their spots in the final of the men's 100 breaststroke in first and second, respectively.

Ryosuke Irie qualified in first in 53.48 seconds to reach the final in the men's 100 backstroke. The finals will be held Wednesday.

On the women's side, Kanako Watanabe triumphed in the 50 breaststroke in 31.07, but fell short of the qualifying standard. In the women's 100 butterfly, Natsumi Hoshi reached the final with a top time of 58.63 in the semis, but third-year junior high school student Rikako Ikee was eliminated in the heats.