Daiya Seto defended his 200-meter butterfly title at the Asian Games on Sunday.
Seto, the reigning world bronze medalist in the event who claimed gold at the Asian Games in Incheon in 2014, touched in 1 minute, 54.53 seconds in the final at GBK Aquatic Center in Jakarta.
His compatriot Nao Horomura made it a one-two for Japan, touching 1.05 behind, and China's Li Zhuhao won bronze.