Gagamaru Masaru (Japanese: 臥牙丸 勝, born 23 February 1987 as Teimuraz Jugheli (Georgian: თეიმურაზ ჯუღელი)) is a Georgian former professional sumo wrestler from Tbilisi. The third Georgian national after Kokkai and Tochinoshin to make the top makuuchi division, he made his professional debut in November 2005, reaching the jūryō division in November 2009 and makuuchi in July 2010. Originally from Kise stable, he briefly competed for the Kitanoumi stable before moving back to the Kise stable after it was re-established. His highest rank was komusubi. He won two special prizes for Fighting Spirit and was runner-up in one top division tournament. After missing nearly all of 2020 through injury and falling greatly in rank, he announced his retirement during the November 2020 tournament.