Hiroyuki Nishiuchi
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Hiroyuki Nishiuchi (born October 13, 1975) is an athlete from Japan. He competes in triathlon.
Nishiuchi competed at the first Olympic triathlon at the 2000 Summer Olympics. He took forty-sixth place with a total time of 1:56:59.76.
Four years later, at the 2004 Summer Olympics, Nishiuchi competed again. He placed thirty-second with a time of 1:57:43.51.