Danshoku Dino
Since January 2003, Koshinaka has been a freelancer, wrestling for various promotions through Japan, both major and independent. As a freelancer, he has won three championships: the NWA Intercontinental Tag Team Championship with Takao Omori in 2004 for Pro Wrestling Zero1, the interim IWGP Tag Team Championship with Togi Makabe in 2006 for New Japan Pro-Wrestling, and the KO-D Tag Team Championship with Danshoku Dino in 2010 for Dramatic Dream Team. On January 4, 2016, Koshinaka made a surprise return to NJPW by taking part in the New Japan Rumble on the Wrestle Kingdom 10 pre-show. He was the second to last man eliminated from the match by the eventual winner, Jado.