Akihiro Yamaguchi (山口 観弘, Yamaguchi Akihiro, born September 11, 1994) is a retired[1] Japanese swimmer and former world record holder who specializes in the breaststroke.

At the 2011 World Junior Swimming Championships in Lima, Yamaguchi won a total of four medals: one gold and three silvers.

His gold came in the 200-meter breaststroke with a time of 2:11.70.

On September 15, 2012, at the National Sports Festival of Japan, he set a new world record in the 200-meter breaststroke (long course) with a time of 2:07.01, bettering the previous record of 2:07.28.

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