Former ONE Featherweight World Champion Narantungalag Jadambaa grew up as the eldest of five children and always felt the need to protect his loved ones. After the fall of the Soviet Union, times became tough in Mongolia and criminals harrassed his family, causing Jadambaa to get into several physical confrontations.
To keep him from getting into trouble, a teacher suggested he take up judo to learn discipline, and the training transformed Jadambaa. He fell in love with martial arts and took up Kyokushin karate as well, going on to earn a reputation for his toughness and power while winning several national tournaments in Mongolia. This prompted him to move to Japan to further his martial arts career, where he faced some of the biggest names in kickboxing.
Jadambaa would would return to Mongolia a more evolved martial artist after adding Brazilian Jiu-Jitsu and grappling to his training. He then embarked on a highly successful mixed martial arts career, winning his way across Asia to claim the Legend Lightweight Championship. It was at this time that tragedy struck, as his mother passed away from cancer. The loss affected Jadambaa deeply, and he resolved to honor her memory by becoming a World Champion. He would achieve that feat in 2014, claiming the ONE Featherweight World Title to cement his place among the best martial artists of his time.