Koji Aoyama (青山 浩二, born August 12, 1983) is a Japanese former professional baseball pitcher.

He played in Nippon Professional Baseball (NPB) from 2006 to 2020 for the Tohoku Rakuten Golden Eagles.

Tohoku Rakuten Golden Eagles selected Aoyama with the third selection in the 2005 NPB draft [jp].

[1] On March 25, 2006, Aoyama made his NPB debut.

[2] This biographical article relating to a Japanese baseball pitcher is a stub.