DEEP Openweight Champion Ken Hasegawa began his martial arts journey with judo in high school, training alongside a friend who was on the school competition team. He competed in “the gentle way” through college, and even joined a corporate team after graduation as a third-degree judo black belt.
However, he felt that it was not enough for him to realize his dreams of international martial arts glory. That would all change one day while he was training at a local weightlifting gym, when a friend suggested he try his hand at competing in the cage. The rest was history, as Hasegawa quickly compiled an excellent undefeated record. Competing mostly in Japanese promotion DEEP, he quickly defeated a string of veteran opponents to become the promotion’s openweight titleholder.
In June 2018, Hasegawa found his way to ONE Championship to test himself against the world’s best martial artists, and received the opportunity of a lifetime on his promotional debut. He challenged two-division ONE World Champion Aung La N Sang for the ONE Middleweight World Title in the Myanmar hero’s hometown of Yangon, but was ultimately unsuccessful in a bout that many are hailing as the best bout in ONE history.