In late 2011, Takayama began making appearances for New Japan Pro-Wrestling as a member of Minoru Suzuki's Suzuki-gun, which built to a match on January 4, 2012, at Wrestle Kingdom VI in Tokyo Dome, where he was defeated by Togi Makabe in a singles match. On March 18, Takayama and his Suzuki-gun stablemate, Lance Archer, unsuccessfully challenged Hiroyoshi Tenzan and Satoshi Kojima for the IWGP Tag Team Championship. In 2016, Takayama began working primarily for DDT Pro-Wrestling, and in April 2017 won both the KO-D Tag Team Championship with Danshoku Dino and the Right to Challenge Anytime, Anywhere contract for the KO-D Openweight Championship. He lost the contract to Yasu Urano on May 4, after a spinal cord injury. Because of the injury, Takayama and Dino were stripped of the KO-D Tag Team Championship on May 9. Paralysis (2017) Takayama was injured at a DDT show on May 4, 2017, when he landed on his head when attempting a sunset flip on Yasu Urano. The match was ended immediately and Takayama was rushed to a hospital, where he was diagnosed with a "cervical spinal cord injury due to degenerative cervical spondylosis". For the following months, Takayama remained bedridden and was being taken care of by his wife and son, while the public was left unaware of the extent of his injury. On August 6, it was reported that the injury had left Takayama paralyzed from the neck down, reportedly ending his pro wrestling career. Takayama's situation was made public on September 4, when it was announced that he could now breathe on his own, but was still paralyzed from the shoulders down and was not expected to recover. DDT and Takayama's close friend Minoru Suzuki announced the creation of a foundation named "Takayamania", set to help Takayama and his family with his medical costs. Promotions across Japan came together to set up donation boxes for the foundation at their events. Mixed martial arts career Pride Fighting Championships Takayama had his anticipated debut in MMA at the event PRIDE 14 against fellow professional wrestler Kazuyuki Fujita. His performance would impress pundits by keeping the fight competitive despite the experience gap, as he escaped repeatedly from underneath the heavier Fujita and exchanged hard strikes in the muay thai clinch with him in the early minutes. Even though his stamina faltered later, which allowed Fujita to deliver multiple knee strikes to the head