| Ryohei Haga | |
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| Birth Date: | 17 September 1988 |
| Birth Place: | Obihiro, Japan |
is a Japanese speed skater who is specialized in the sprint distances.
Haga competed in the 1000m event at the 2010 Winter Olympics in Vancouver and finished in 29th place.
At the first competition weekend of the 2018–19 ISU Speed Skating World Cup in Obihiro, Japan in March he finished second in the second 500m event.[1]