柴田勝頼
Having both left New Japan, Murakami and Katsuyori Shibata announced the formation of a new promotion, Big Mouth Loud in January 2005. Backed by Fumihiko Uwai, the promotion was set to focus largely on shoot-style, and would use talent from other promotions as well as their own contracted wrestlers. At Big Mouth Loud's first show in September 2005, Murakami defeated Shibata in the main event. Murakami reignited his feud with Enson Inoue at the next show in December 2005, defeating him in a singles match. Murakami continued to compete for BML until the promotion's closure in mid-2006.