真霜拳號
On August 5, 2012, Takizawa returned to Kaientai Dojo, entering the one night Nepture tournament and defeating Kaji Tomato in his first round match. After wins over Saburo Inematsu and Taka Michinoku, Takizawa defeated Hiro Tonai in the finals to win the tournament. Takizawa continued his win streak until September 19, when he unsuccessfully challenged Daisuke Sekimoto for the Strongest-K Championship. On February 24, 2013, Takizawa and Akito won the 2013 Bo-So Golden Tag Tournament, defeating the team of Kengo Mashimo and Ryuichi Sekine in the finals. Following the tournament, Takizawa was named the number one contender to Yuji Hino's Strongest-K Championship. On April 14, Takizawa defeated Hino in the main event of "evolution11", Kaientai Dojo's largest annual event, to win the Strongest-K Championship for the first time. Takizawa made his first successful title defense on May 6 against Hiro Tonai. On July 2, Takizawa was stripped of the title and pulled from all upcoming events, after he had been arrested by Japanese authorities.