Ken Takakuwa (高桑 健, Takakuwa Ken, born 25 March 1985) is a Japanese swimmer.

He competed in the 200 m individual medley event at the 2012 Summer Olympics, advanced to the final and finished sixth.

[2][3] Takakuwa also took part in the 200m IM at the 2008 Summer Olympics and placed fifth.

[3] In that same event at the Asian games, he won gold in 2010 and silver in 2006.

He also won bronze in the 400m IM at the 2010 Asian Games.