NTV G+ Cup Junior Heavyweight Tag League
Shortly after the formation of Zero1, Takaiwa also began making appearances in Pro Wrestling Noah, and in October 2001 defeated Yoshinobu Kanemaru to win the GHC Junior Heavyweight Championship. Takaiwa held on to the title until December, when he dropped it to Naomichi Marufuji. Takaiwa returned to Noah in 2003 to take part in the Differ Cup, a tag team tournament featuring junior heavyweights. Teaming with Zero1 trainee Yoshihito Sasaki, they made it to the finals where they were defeated by Toryumon representatives Ultimo Dragon and Yossino. On December 23, 2006, Takaiwa won the championship a second time, defeating Takashi Sugiura at a SEM event. He held the title until April 2007, dropping it to Mushiking Terry. Takaiwa returned to Noah again in 2011, taking part in the NTV G+ Cup Junior Heavyweight Tag League with his trainee Osamu Namiguchi. The two performed poorly, earning just two points and failing to advance. Takaiwa made another one off return to Noah in December 2013, unsuccessfully challenging Taiji Ishimori for the GHC Junior title.