Yasuhiro Koseki is making the most of his time back after a suspension for a team altercation, racing to within .06 of the Japanese 100m breast national record.
Great Britain’s James Guy closed out the Japan Open with a personal best 51.50 in the men’s 100 fly.
Jack Conger of the USA took the bronze with a 54.09, just off his personal best from two years ago, while teammate Jacob Pebley finished just outside medal position with a 54.22.
Sarah Henry won the first gold medal of the World University Games. Her victory in the 400 IM was the first of three golds for Team USA.
Henrique Martins hit a top-10 ranked world time to lead the 50 fly, highlighting the opening session of the 2015 World University Games.