Up-and-comer in December 2023 After competing in just four tournaments, Ōnosato's promotion to the top division was announced for the January 2024 tournament. The promotion made him the first recruited by the former
Kisenosato to be elevated to the top division. He is also the third-fastest to reach the top division since 1989 (after
Endō and
Hakuōhō), doing so in four tournaments under the old system. Ōnosato performed well in the first half of the tournament, however, recording a defeat on the third day against
Ōnoshō. However, he maintained his position as one of the tournament's leading wrestlers by recording a sixth consecutive victory and a on Day 9 against
Meisei. On the tenth day, Ōnosato faced another tournament leader,
Kotonowaka, however losing the match by and leaving Kotonowaka alone in the lead in the title race. Ōnosato then suffered two consecutive defeats on Day 11 and 12, at the hands of
Hōshōryū and
Terunofuji, virtually eliminating him from the title race. Because he had a match against Terunofuji, Ōnosato became the first wrestler to face a in his first tournament in 10 years, since
Ichinojō faced both
Kakuryū and
Hakuhō in the
September 2014 tournament. For his performances, Ōnosato was however elected by popular vote
Morinaga's Wrestler of the Day Award no less than four times during the tournament. For his 11 wins in his first tournament in the top division, he was also awarded the
Fighting Spirit prize. After his inaugural tournament in the top division, Ōnosato commented that he was grateful to have been able to learn from the ranks despite suffering three consecutive defeats at the hands of the upper echelons. During the March tournament of the same year, Ōnosato remained in the group of wrestlers leading the championship during the first week (tied with
Takerufuji) nevertheless recording a defeat on the seventh day against
Ōnoshō. Ōnosato managed to keep himself in the title race on Day 9 by beating a -ranked wrestler for the first time, defeating Wakamotoharu. Ōnosato continued his tournament with a notable win over
Takakeishō on Day 11. On Day 14, he maintained his chances of winning the tournament with an eleventh victory over
Abi, the to be decided on the final day in his match against Hōshōryū. The latter defeated Ōnosato for the second time in a row, although the championship was not at stake because an injured Takerufuji had already won a thirteenth victory to become the champion. For his prowess at the tournament, however, it was announced that Ōnosato would receive the
prizes for Technique and Fighting Spirit. His second consecutive 11-win record in the top division made him a strong contender for potential promotion in May. Two days later, Ōnosato apologized for his actions. He added that he was grateful to have been allowed to wrestle for the final days of the spring regional tour, which was in progress at the time.
promotion and first titles When the for the May 2024 tournament was announced, Ōnosato was promoted to his then-highest rank, , making his debut in the ranks in just six tournaments, the second-fastest progression to these ranks since the
Shōwa era (behind the record set in five tournaments by
Ichinojō). At a press conference following the publishing of the , Ōnosato was seen wearing a small topknot for the first time. His stablemaster Nishonoseki commented that he never imagined Ōnosato would rise through the ranks so quickly. Both also apologized again with regard to the previous September's drinking situation, with Ōnosato stating that he caused trouble to so many people and his stablemaster, and that the most important thing was for him to keep winning. On the opening day of the May 2024 tournament Ōnosato faced
Terunofuji and scored an upset victory over his top-ranked opponent by ("beltless arm throw"). Ōnosato was the only wrestler to win on the first day of the tournament. He continued to win over higher ranked wrestlers, beating
Wakamotoharu (Day 4) and
Kirishima (Day 5) and
Kotozakura (Day 6). On Day 8, he defeated one of his direct rivals,
Daieishō. On the ninth day, he lost his one-win lead when he was defeated by
Hiradoumi in an upset creating a tie between five wrestlers. Ōnosato climbed back into contention after that, and entered the final day of the tournament as the sole leader with 11 wins. He quickly defeated his Day 15 opponent,
Abi, to avoid a playoff and clinch his first
Emperor's Cup. Having won his first top-division title in seven tournaments since his debut, Ōnosato broke the speed record for a maiden top division title that had just been set by
Takerufuji in the previous tournament. Ōnosato also was the first to win the top-division championship immediately after promotion to in 67 years, the last being the late
Haguroyama in May 1957. Additionally, by winning two more
special prizes he became the first wrestler in 25 years to win a special prize in each of his first three top-division tournaments. Ōnosato dedicated his victory to the people of
Ishikawa Prefecture, who were affected by a
deadly earthquake on January 1. The day after winning the Emperor's Cup he told reporters at Nishonoseki stable: "I'm happy to have won the championship, but my final goal is not here. I want to keep dashing up and go higher". He added that his
stablemaster told him after his third loss that "the title is gone", and also before the final bout that he should not celebrate, even if he had won the match and the championship. Ōnosato said that those words made him feel less stressed, renewing his gratitude for joining the stable. Following the May tournament the head of the
Yokozuna Deliberation Council, Masayuki Yamauchi, commented that Ōnosato's victory was "a sign that the sumo world is about to undergo major changes", adding his belief that Ōnosato would eventually reach the rank. The Sumo Association also downplayed rumors of a possible promotion earlier than usual, saying that only Ōnosato's 12 wins in May would count towards the
promotion requirement of 33 wins over 3 tournaments, normally tallied while a wrestler is either a or . Ōnosato was awarded the Outstanding Performance prize for the second time, making him the first wrestler in sumo history to receive at least one of the special prizes in each of their first four top-division tournaments. With 21 victories across two tournaments, Ōnosato needed at least 12 wins at the September tournament to meet the promotion threshold. In the September 2024 tournament, Ōnosato won eleven matches in a row out of the twelve required for promotion. The next day, the certainty of his promotion was postponed after he suffered his first defeat of the tournament in his match against former
Wakatakakage. At the end of the tournament, Ōnosato secured both his promotion to the second-highest rank in professional sumo and the championship by defeating the two participating , Kotozakura and Hōshōryū, on days 13 and 14 respectively. The process of formalizing Ōnosato's promotion was not announced until he had won his thirteenth victory. With his victory over the two , the press echoed that Ōnosato now represented a new elite and dominant wrestler in the professional world, also raising expectations that he would become the 74th in the history of the sport. ======
Promotion On September 25, 2024, the Japan Sumo Association unanimously promoted Ōnosato to the rank of . His promotion came after nine tournaments, the fastest for any wrestler since the current six-tournament system was implemented in 1958. He surpassed the twelve-tournament records set by
Haguroyama,
Yutakayama, and
Miyabiyama. Following the Sumo Association's approval, elders Dewanoumi (former
Oginohana) and Hanaregoma (former
Tamanoshima) delivered the news to Ōnosato at his stable in
Ibaraki Prefecture. In formally accepting the promotion, Ōnosato said that he would continue to devote himself to the way of sumo, striving to become a wrestler who does not tarnish the rank. He later explained that he used the words with his father in mind, after hearing that his father told others that he wanted his son to be . Ōnosato is the first to be promoted before his hair has grown long enough to style into an . Ōnosato won nine matches in his debut at the November 2024 tournament. He finished his first year in sumo's top division with 65 wins, just one behind fellow
Kotozakura for most wins in 2024. At a reception for Nishonoseki stable following the tournament, Ōnosato said that his first tournament as an was disappointing. He added that he wanted to continue winning and be promoted next year. Although disappointed by his results, Ōnosato was nevertheless awarded two prestigious awards with the 2024
Japan Professional Sports Grand Prize's Rookie of the Year Award, and the 2024
Wrestler of the Year award by the newspaper
Sports Hochi.
run During the 2025 March tournament, Ōnosato established himself as one of the competition's leaders along with
Takayasu and
Churanoumi, recording seven wins in the first week. On day ten, Ōnosato was alone in the lead with Takayasu, the two meeting in a match in which the latter emerged victorious. With the hazards of competition, the two wrestlers found themselves tied again until the final day of the tournament, with the two wrestlers facing off in a playoff for the championship. Ōnosato won the match by ('rear push out'). The 2025 March title was the third for the , and his first since his promotion to the second-highest rank in professional sumo. He also became, along with
Mitakeumi, the active wrestler with the most championships to his name. With this victory, Ōnosato also found himself in a situation of promotion to the supreme rank of should he win the May tournament, as the usual requirement for promotion is back-to-back championships at the rank (or a similar performance). On this subject, the chairman of the
Yokozuna Deliberation Council expressed his expectations, explaining that Ōnosato had more than fulfilled the obligations of the rank of . During the 2025 May tournament, Ōnosato stood out as the sole leader of the competition, recording eight consecutive victories during the first half of the tournament. After Day 11, Ōnosato asserted his position as tournament leader by recording eleven consecutive wins and a two-victory lead over his nearest pursuers, further widening his gap with three victories from day twelve onwards, adding the possibility of clinching the championship in his next match. On Day 13, Ōnosato defeated fellow
Kotozakura to clinch his second straight top division championship, and his fourth title overall. The result all but assured that he will be promoted to become professional sumo's 75th . Ōnosato told reporters after the win that he did not believe he would be able to clinch the title so early, but wanted to make sure he won his last two matches. After winning his first fourteen matches, Ōnosato nevertheless failed to secure a (perfect score championship win), suffering his only defeat to
Hōshōryū on the final day.
promotion Following the May 2025 tournament, Sumo Association chairman Hakkaku (the 61st
Hokutoumi) approved the judging department's request to convene an extraordinary board meeting for the purpose of discussing Ōnosato's promotion to sumo's top rank. On May 26, 2025, the
Yokozuna Deliberation Council convened and, in a meeting that lasted only six minutes, unanimously recommended that the Sumo Association promote Ōnosato to . Council chairman and former
lower house Speaker Tadamori Ōshima commented after the meeting that the opinions of the council members were "unanimous and without question," while also mentioning the candidate's calm composure, full-body sumo and confident performance under pressure. The Sumo Association sent Dewanoumi (former
Oginohana) and Hidenoyama (former
Kotoshōgiku) to Nishonoseki stable to deliver the formal news of the promotion to Ōnosato. Ōnosato gave an acceptance speech similar to the one he gave eight months earlier at his promotion, saying that he would devote himself to training in order not to tarnish the rank and would aim to become a . The governor of
Ishikawa Prefecture,
Hiroshi Hase, also expressed his wish to award him the prefectural honorary prize. Once the news had been delivered, the traditional preparations surrounding the exercise of the rank began. Around 70 wrestlers from the
Nishonoseki (or clan) took part in the braiding of the 's regal (rope). Expectedly, Ōnosato chose to inherit his master's Unryū
ring-entering ceremony style, confiding that he had practiced several times the day before by watching videos of his master performing his own ceremony. In addition to the advice of his own master, he also benefited from the guidance of Shibatayama (former
Ōnokuni), stablemaster of the
eponymous stable which belongs to the Nishonoseki , and who also trained Kisenosato to perform his own ceremony when he was promoted to professional sumo's supreme rank. On the same day, it was revealed that Ōnosato would be accompanied at his inaugural ceremony by
Takayasu, as (sword bearer), as he is a former stablemate of his master Nishonoseki, and
Ryūden, as (dew sweeper), as he had also served at his master's ring entry ceremonies. Finally, Ōnosato was to use a set of made for his master when the latter took part in his first tournament as . Because of the rains forecast for Tokyo on May 30, the public ceremony at the
Meiji Shrine was cancelled. However, a ceremony was still held in the inner shrine, reserved for Sumo Association executives and relatives. It marked the first such time that the event was closed to the public, except for
Terunofuji's ceremony in September 2021 which was held during the
COVID-19 pandemic. Despite the closure, approximately 1,000 people showed up to the inner shrine's entrance. The following day Ōnosato performed the in public for the first time, at the retirement ceremony for former
Kotoekō. When the July 2025 rankings were published Ōnosato was listed as , due to the requirement that at least two wrestlers be listed on the as .
career 2025 Ōnosato suffered his first defeat as a newly-promoted yokozuna on the fourth day of the July 2025 tournament in Nagoya, giving up a to
Ōhō. Later on in the tournament, he suffered losses to
rank-and-filers Hakuōhō and
Tamawashi. Ōnosato conceded his fourth on Day 13 to
Kotoshōhō, which set a new record for the most gold stars given by a in their debut at sumo's highest rank. Ōnosato was eliminated from championship contention the following day. Ōnosato was still able to win his final 2 matches of his tournament against
Wakatakakage and
Kotozakura to finish with 11 wins and 4 losses, including finishing as a runner up () in his debut. During the 2025 September tournament, Ōnosato remained among the top wrestlers in the championship, conceding only one
upset defeat on the fourth day against
Hakuōhō. Trailing behind his fellow Hōshōryū, Ōnosato took the lead in the competition after Hōshōryū suffered a second consecutive defeat at the hands of
Kotozakura, who also gave him a default victory on Day 14 after withdrawing due to injury. On the final day, the two faced each other for the title, the match becoming the first time since the
2020 Osaka tournament where two could enter a playoff situation on the final day. Hōshōryū defeated Ōnosato by , triggering the playoff, which he then lost, when Ōnosato defeated him by . The match was also the first playoff between two since
Asashōryū and
Hakuhō in
January 2009. During the tournament, Ōnosato won a total of 519 (prize money), amounting to
¥31.14 million, surpassing the record of ¥30.901 million set by
Hakuhō during the
2015 January tournament. With this championship, Ōnosato is the first Japanese wrestler to win three tournaments in a single year since
Takanohana in
1997, and the first Japanese to win a tournament since 2017, when his master
Kisenosato won the March tournament. On 7 October, Ōnosato participated in the commemorative ceremony for the centennial of the
Japan Sumo Association. He performed a special with fellow , Hōshōryū. This was the first time since 2017 that the ceremony was performed. During the November 2025 tournament, Ōnosato emerged as one of the leaders alongside the other Hōshōryū and
Aonishiki. He faced Aonishiki on the thirteenth day. The outcome of the match, which saw the emerge victorious, was controversial because Aonishiki and Ōnosato appeared to touch the ground and the outside of the ring at the same time without a being called, prompting a reaction from the former
Mainoumi (then an NHK commentator) who argued that a debate should have taken place. For his part, chief judge Takadagawa (the former Akinoshima) argued that since Aonishiki was in the air, he was the designated loser. After suffering a third defeat on the fourteenth day against
Kotozakura, Ōnosato found himself tied for the title with Hōshōryū and Aonishiki. Ahead of the final day, Ōnosato withdrew from the tournament citing a dislocation of the left
acromioclavicular joint in his match against Aonishiki and requiring a month of rest. The news of his withdrawal was met with surprise, handing Hōshōryū a default win. Setting up a play-off against Aonishiki, leading to Aonishiki's first tournament win and promotion to .
2026 Ōnosato's performance would continue to be affected by this left shoulder injury. At the January 2026 tournament, Ōnosato finished with a record of 10 wins and 5 losses. At the March 2026 tournament, Ōnosato would continue to struggle with the left shoulder injury. He started the basho with three consecutive losses, giving up to
Wakatakakage and
Fujinokawa in the process. This was the first time a Yokozuna had lost 3 consecutive matches from opening day since Ōnosato's master,
Kisenosato, in January 2019. He withdrew from the tournament on Day 4. ==Fighting style==