""Osa", which is a play on his name Osamah, and the word "Osu", a commonly known greeting used in martial arts."
Team
Atos
Biography
Osamah Almarwai, commonly known as Osa, is a jiu-jitsu black belt under André Galvão and a representative of the Atos Academy in the sport's global circuit. Osamah Almarwai is also the first BJJ black belt from the Republic of Yemen, and the first Yemen citizen to win an International Brazilian Jiu-Jitsu Federation (IBJJF) World title, which Osa conquered in 2021 in the brown belt roosterweight division.