As coach As manager Koji Akiyama (秋山 幸二 Akiyama Kōji, born April 6, 1962) is a retired Japanese professional baseball player.

A speedy slugger, Akiyama accumulated more than 400 career home runs and 300 career stolen bases, a feat matched only by one other NPB player in history (Isao Harimoto).

Akiyama was an integral part of the "Invincible Seibu" during the 1980s and 1990s, named such due to their sustained domination of the league, winning 11 league championships and eight Japan Series championships between 1982–1994.

Akiayma was a Best Nine Award-winner eight times, a Golden Glove winner 11 times (1987–1996, 1999), and appeared in 18 consecutive Nippon Professional Baseball All-Star Series (1985–2002), an NPB record.

In addition, Akiyama was Japan Series MVP twice (1991 and 1999), and a Matsutaro Shoriki Award-winner three times (1991, 2011, and 2014).