

Shinnosuke Ogasawara (小笠原 慎之介, Ogasawara Shinnosuke; born October 8, 1997) is a Japanese professional baseball pitcher in the Washington Nationals organization. He has previously played in Nippon Professional Baseball (NPB) for the Chunichi Dragons.
Ogasawara was the winning pitcher at the 2015 Summer Koshien tournament and was regarded as the second best high school pitching prospect in the 2015 NPB draft behind Gifu Commercial High School's Jumpei Takahashi. He holds the record for the worst start to a rookie season in the Japanese Central League going 0–5 in decisions before registering his first professional win.
He has represented Japan on the international stage at under-15 and under-18 level helping his country to a runner-up position in the 2015 U-18 Baseball World Cup.
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