A four-time Olympic gold medalist, Kosuke Hagino is a Japanese competitive swimmer born on August 15, 1994, who specializes in the individual medley and 200 m freestyle.

His achievements so far:-

• Winner of gold, silver and a bronze in the 400m medley, 200m medley, and 4*200m freestyle at the 2016 Rio Olympics
• Secured bronze at the 2012 London Olympics
• Won two silver medals each in the 4200m freestyle and 200m medley at the 2013 World Championships (LC) held in Barcelona
• Secured two gold and three silver medals at the 2014 Gold Coast Pan Pacific Games
• Secured a gold and silver at the 2014 Doha World Championships (SC)
• Also won four gold medals, a silver medal and two bronze at the Asian Games of 2014 held in Incheon
• Acquired the World Swimmer of the Year and is the first and only Japanese to be honored with this award