Yasuhiro Koseki shook off a slow morning heat to win the men's 100-meter breaststroke gold from Lane 1 at the Asian Games on Wednesday.
The 26-year-old, who won in 58.86 seconds, completed a 100-200 breaststroke double in Jakarta. With the 50 coming up Friday, Koseki has a chance to earn a hat trick of golds in the stroke.
Japan saw more gold later when Daiya Seto clocked 4:08.79 to beat reigning Olympic champion Kosuke Hagino by 1.51 in the men's 400-meter individual medley. China's Wang Shun was third.