took part in ZERO1's 2006 Fire Festival tournament, making it to the semi finals before losing to Shinjiro Otani. He also debuted for Pro Wrestling Noah, taking part in a tournament for the GHC Tag Team Championship alongside Shinjiro Otani. They reached the semi-finals before losing to eventual winners Takeshi Morishima and Muhammad Yone. Murakami was also pinned by Mitsuharu Misawa in their only singles match in October. In the first match of the 2007 Fire Festival, Murakami suffered a severe brain injury against Shinjiro Otani, which forced him to leave professional wrestling effective immediately to undergo brain surgery. Return (2010–2014) In February 2010 Murakami returned to pro wrestling, as Big Murakami, losing to Kensuke Sasaki in a match for Sasaki's Kensuke Office promotion. He also returned to Pro Wrestling Noah, and on March 26 teamed with Katsumi Usuda to challenge Takeshi Rikio and Muhammad Yone for the GHC Tag Team Titles but they came up short. Murakami later announced it as his home promotion, and continued to compete with the promotion until its closure in 2014. Return in Noah (2020–) On December 26 at Kongoh Produce ~ Diamond 3 Murakami made his return in Pro Wrestling Noah as NOSAWA Rongai announced his return to the company. On December 29 at Takashi Sugiura 20th Anniversary Show he fought in a 7 vs 7 match and his team, Takashi Sugiura, Kazushi Sakuraba, Kendo Kashin, NOSAWA Rongai, Kaz Hayashi, Daisuke Nakamura won by defeating the whole Kongoh lead by Kenoh. On January 4, 2021 at Noah New Sunrise 2021 Sugiura-gun (Kazunari Murakami, Kazushi Sakuraba & Takashi Sugiura) defeat Kongoh (Katsuhiko Nakajima, Kenou & Masa Kitamiya) by referee's decision. On January 16, 2021, at Noah Higher Ground 2021 - Day 2 in another six-men tag team match Sugiura-gun (NOSAWA Rongai & Takashi Sugiura & Kazunari Murakami) defeat Kongo (Kenou, Manabu Soya & Tadasuke). By defeating three times in a row the Kongoh stable Murakami earned a title match against Kenou for the GHC National Title. On January 23, 2021 at the Noah Higher Ground 2021 - Day 3 show held at the EDION Arena Osaka Kenou retained the title. Mixed martial arts record |- |Win |align=center|5–5 | Lee Young Gun | Submission (armbar) | Jungle Fight 1 | |align=center| 1 |align=center| 1:09 |Manaus, Amazonas, Brazil | |- |Loss |align=center|4–5 | Wallid Ismail | TKO (punches) | UFO: Legend | |align=center| 2 |align=center| 3:03