While studying economics in Chuo University, he acted in a minor theatrical group which was touring around Japan and performing at local schools.
Kamikawa left Chuo University without a diploma, and joined the group Caramel Box to become a full-time actor.
[citation needed] In 1995, Kamikawa starred in a TV drama by NHK, Daichi no Ko, and played the leading role, Lu Yixin.
The original author, Toyoko Yamasaki, initially wanted Masahiro Motoki to play the role.
[citation needed] In 2006, he played Yamauchi Kazutoyo, the leading role of the NHK Taiga drama Kōmyō ga Tsuji.