[6] Murakoshi made his professional debut in April 2011, against Singdam M16muaythaistyle as part of the 2011 Rising Rookies Cup.
[12] His winning streak was snapped by an extra round split decision loss to Seiya Rokugawa during RISE 91.
[18] Murakoshi's five fight winning streak earned him a chance to challenge Hiroki Maeda for the RISE Bantamweight title.
[23] Murakoshi was scheduled to defend his RISE Bantamweight title for the first time against the sixteen year old Tenshin Nasukawa.
He won a split decision against Itto,[27] and scored (T)KO wins over Tomo Arimatsu[28] and Eisaku Ogasawara.
[29] Murakoshi fought a rematch with Tenshin Nasukawa for the RISE Bantamweight title in September 2016.
[33] Afterwards, Murakoshi fought Shunta during Big Bang's ISEHARA event, and won the fight by unanimous decision.
[44] Murakoshi fought Ryusei Ashizawa at the K-1: K'Festa 4 Day 1 event, and won the fight by unanimous decision.
[48] Murakoshi returned to professional competition following a two-year absence from the sport to face the former Krush Super Featherweight (-60 kg) champion Chihiro Nakajima at K-1 World MAX 2024 on September 29, 2024.