Koichi Misawa

is a Japanese baseball pitcher who won a silver medal in the 1996 Summer Olympics. He also played for the Yomiuri Giants, Osaka Kintetsu Buffaloes, and the Tokyo Yakult Swallows in Nippon Professional Baseball from 1997 to 2005.

In 2008, he came to the United States to play in the independent Northern League with the Gary SouthShore RailCats. He posted a 1.69 earned run average in 42.2 innings pitched. During the winter, Misawa played for the Caribes de Anzoátegui in the Venezuelan Professional Baseball League and pitched two thirds of an inning for the Leones del Escogido of the Dominican Professional Baseball League. In 2009, he played his final professional season with the Long Beach Armada of the Golden Baseball League.