Masashi Yamamoto (山本 雅士, Yamamoto Masashi, born November 3, 1994 in Hiroshima, Hiroshima, Japan) is a Japanese professional baseball pitcher for the Kanagawa Future Dreams of the Baseball Challenge League (BCL).

He has previously played in Nippon Professional Baseball (NPB) for the Chunichi Dragons.

On 28 October 2016, it was announced that Yamamoto would be taking a pay cut for the 2017 season and being moved on to a trainee contract.

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