Jun Seo Choi, known by the nickname “Chosen” and also competing under the moniker “Yaksha,” is one of South Korea’s rising welterweight contenders. Representing Team Yaksha, Jun Seo Choi has established himself in Black Combat, where he captured the organization’s welterweight championship and developed a reputation as an explosive finisher. His combination of knockout power and physical attributes—including a 78-inch reach—has made him one of the more intriguing young welterweights on the Korean regional scene.

Jun Seo Choi was born on January 11, 2001. Publicly available information regarding his early life and introduction to martial arts is limited. Tapology lists him as fighting out of Gyeongju-si, South Korea, and affiliated with Team Yaksha and Buffalo Boxing Gym. No verified public interviews or official biographies currently provide additional details regarding his upbringing or amateur combat sports background.

Striking

Jun Seo Choi has built his professional résumé primarily through striking, with most of his victories coming by knockout or technical knockout. His long reach for the welterweight division allows him to fight effectively at range while still generating significant finishing power.

Grappling

Public fight records show that Jun Seo Choi has earned the majority of his victories by strikes rather than submissions. Based on currently available information, there is insufficient evidence to accurately characterize his grappling style or submission game.

Fight IQ

Choi has steadily progressed through increasingly difficult competition, moving from regional promotions into championship bouts in Black Combat. While still developing as a professional, his willingness to compete in title fights early in his career demonstrates confidence and experience against quality opposition.

Jun Seo Choi made his professional debut in 2022 and quickly established himself as a prospect on the Korean regional circuit. Early victories in Uljin Fighting Championship helped build momentum before he joined Black Combat, where his career accelerated.

In 2023=, Jun Seo Choi challenged Won Jun Choi for the vacant Black Combat Welterweight Championship at Black Combat 7. Although he came up short by majority decision, he remained one of the division’s top contenders.

After suffering a catchweight loss to Il Hak Oh at Black Combat Pro Audition 6, Choi rebounded with an impressive run that included a first-round knockout of Won Sik Park to capture the Black Combat Welterweight Championship at Black Combat 14. He entered 2026 riding a three-fight winning streak and ranked among South Korea’s top welterweights.

• Black Combat Welterweight Champion
• Competed in multiple Black Combat main events
• Victory over Won Sik Park to capture the Black Combat Welterweight Championship
• Multiple professional victories by knockout
• Representing Team Yaksha and Buffalo Boxing Gym
• Ranked among South Korea’s leading regional welterweights

Jun Seo Choi has developed into one of Black Combat’s most recognizable young champions in a relatively short period of time. After overcoming early setbacks, he demonstrated resilience by rebuilding his momentum and capturing championship gold.

At only 25 years old, Jun Seo Choi remains in the developmental stage of his career while already competing at the top of the Korean regional scene. Continued success against increasingly experienced opposition will determine whether he eventually earns opportunities on larger international stages.