Yuichi Hosoda (細田 雄一, Hosoda Yūichi, born 6 December 1984) is a Japanese triathlete.

[1] He was a competitor for Japan at the 2012 Summer Olympics where Hosoda finished 43rd overall with a total time of 1:51:40.

[2] Hosoda won the gold medal in Triathlon at the 2010 Asian Games in a time of 1:52:15.56.

He is the winner of the 2014 ITU Aquathlon World Championship.

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