On February 11, 2006 at a Kensuke Office show celebrating Kensuke Sasaki's 20th career anniversary, Nakajima teamed with Genichiro Tenryu against the "dream team" of Kenta Kobashi and Kensuke Sasaki, falling to a Sasaki lariat. On March 21, 2006, Nakajima won a three-way elimination match in AJPW, defeating both Tomoaki Honma and NOSAWA Rongai to earn a spot in Block B of the prestigious 2006 Champion Carnival, becoming the youngest man to participate in the tournament. Nakajima finished in last place in the block with two points by defeating D'Lo Brown. On April 19, 2006, Nakajima entered Big Mouth Loud (BML), losing to company ace Katsuyori Shibata. The following month, Nakajima and Kensuke Sasaki battled in Big Japan Pro Wrestling (BJW), defeating Big Japan's Daisuke Sekimoto and Dramatic Dream Team's (DDT) Daichi Kakimoto in a tag team match when Nakajima pinned Kakimoto.