In his first years, he fought mainly for Greatest Common Multiple, also known as GCM, but in 2005 he transitioned to Shooto and remained there until 2008.
With a professional record of nine victories, two defeats and four draws, Murayama returned to the GCM, this time to fight in Cage Force.
Counting his loss against Yoichiro Sato at Shooto: Shooting Disco 9, he stood with a total record of nine victories, five defeats and five draws.
[3] Murayama faced Sato a third time — and once again for the title — on June 11, 2011, at Shooto: Shooting Disco 15.
This time Murayama won via unanimous decision (30–27, 30–27, 30–27) and became the new Shooto Pacific Rim 168–pound champion.
[6] Murayama faced longtime mixed martial arts veteran Yuki Kondo on June 30, 2013, at Pancrase 248.
[9] As his first title defense attempt, Murayama faced Hiromitsu Miura at Pancrase 281 on October 2, 2016.
[13] Murayama then fought Yuki Kondo at Pancrase 312 on February 16, 2020, winning the fight via unanimous decision.