is a Kazakhstani professional sumo wrestler from Almaty. He began his professional sumo career in November 2021 at the age of 24. After eight tournaments and two lower division championships, he was promoted to the top division, becoming the first Kazakh to do so. His highest rank to date has been 3 as of the July 2025 tournament. He wrestles for Kise stable.
Yersin originally practiced judo and Kazakh wrestling until the age of 18 when, at the suggestion of former Asashà Âryà «, he transferred to a high school in Japan to participate in amateur sumo wrestling. He then entered Nihon University and joined their sumo club. In 2019, he finished as the runner-up in the All-Japan Championships, and placed in the top 16 at that same tournament the following year.
Upon graduating from university, Yersin was urged to enter professional sumo, where he would be eligible to skip the lower two divisions and start at the rank of because of a dispensation given to amateur wrestlers who have finished in the top 8 in tournaments such as the All-Japan Championships. He joined Kise stable under the of Kinbà Âzan, which is derived from Mount Kinbà  in Kumamoto, the hometown of his stablemaster (former Higonoumi) but also to be inspired by the martial spirit of Miyamoto Musashi, who wrote parts of his Book of Five Rings while staying on the mountain.
Kinbà Âzan's first tournament was the November 2021 in Kyushu, where he won all seven of his matches and took the championship, resulting in his promotion to . At the March 2022 tournament in Osaka, he won the championship with a 7âÂÂ0 sweep at the rank of 34. He would work his way up the rankings and eventually earn promotion to the second-highest professional division, , in September 2022. Following winning performances in three tournaments (including double digit wins in two of them), he was promoted to the top division in March 2023, becoming the first wrestler from Kazakhstan to do so. At a press conference following his top division promotion, Kinbà Âzan said that he wanted to wrestle his own style of sumo, adding he was motivated to become stronger following a recent visit to Kazakhstan to visit his mother, who was unwell. In his top-division debut he secured 11 wins and was awarded with the (Fighting Spirit prize), which is one of the special prizes awarded at the end of every tournament.
During the of May 2023, Kinbà Âzan admitted that he was prone to breathing problems when put under stress or too much effort after he appeared to be genuinely uncomfortable after a session with more senior wrestlers. In the following tournament, Kinbà Âzan notably won his match against Takakeishà Â, handing him his fourth defeat on Day 10. This victory marked the first time in seven years that a ranked wrestler without a fully grown à Âichà Âmage inflicted a defeat on an . The most recent previous occurrence of such a victory had been in July 2016 when Mitakeumi earned a victory over then- Terunofuji. Kinbà Âzan nevertheless finished the tournament with a score of 4âÂÂ11. After two successive tournaments, in which he recorded a negative score (), Kinbà Âzan also withdrew from the of August, reporting a sprained cervical vertebra requiring 30 days of rest, an injury which he had already contracted at the May tournament and which really limited his capabilities.
Kinbà Âzan remained in the division throughout 2023, however, and started 2024 at the rank of 6 east. During the twelfth day of the tournament, he suffered a knee injury in his match against Tsurugishà  and had to limp back up the , telling the press afterwards that he felt severe pain even with painkillers. On the fourth day of the March 2024 tournament, Kinbà Âzan fell hard outside the ring in his loss to Tamawashi. He withdrew the following day, with the medical certificate stating he would need seven days of rest due to a cervical vertebra sprain. After three days of rest, he returned to competition. In the next two tournaments, Kinbà Âzan conceded 22 defeats, subsequently resulting in his demotion from the top division to . At the November tournament, however, he won his third professional title, taking the championship with 13 wins. The November performance put him back at the top division in January 2025 as West Maegashira #14.
At the January 2025 tournament, Kinbà Âzan stood out, winning nine consecutive matches from the first day of the tournament to set a personal record, also establishing himself as the only wrestler in the tournament to remain unbeaten halfway point of the competition. On Day 10, however, he suffered his first defeat at the hands of Abi, reducing to one victory the two-victory gap he had spared against the trio of wrestlers still in positions to challenge him for the title (à Âhà Â, Takerufuji and Chiyoshà Âma). He however maintained an outright one-win lead after 13 days, having defeated two opponents in à Ânosato and Kotozakura. On Day 12, he lost his match to Hà Âshà Âryà «, the nephew of Asashà Âryà «, the man who introduced him to sumo, allowing the to make a stronger bid for the title. Before the match, the former Asashà Âryà «, who closely follows Kinbà Âzan's performance, allegedly called stablemaster Kise (the former Higonoumi) to encourage the wrestler, going so far as to say that Kinbà Âzan shouldn't lose to , referring to Hà Âshà Âryà «. On the final day, Kinbà Âzan faced à Âhà Â, the latter (along with Hà Âshà Âryà «) being one of two wrestlers only one defeat behind the tournament leader. Kinbà Âzan lost the match, forcing at the very least a playoff between the two wrestlers. Later, Hà Âshà Âryà « also qualified for the title after defeating Kotozakura, with the becoming a three-way fight. Kinbà Âzan lost the title to Hà Âshà Âryà «, who previously defeated à Âhà Â. For leading the competition, Kinbà Âzan nonetheless received his second for Fighting Spirit, however missing out on the award for Outstanding Performance after losing to à Âhà  in regulation.
Kinbà Âzan primarily uses pushing and thrusting techniques, with most of his wins by way of (frontal push out), (frontal force out) and (frontal thrust out).
Kinbà Âzan is a Muslim and therefore abstains from pork and alcohol. He is the second Muslim sumo wrestler since à Âsunaarashi from Egypt.