Dynasties, dominance, and the rikishi who defined their age

The golden age of classical sumo

The first decades of the Japan Sumo Association's existence — roughly the 1920s through the early 1940s — are regarded by sumo historians as a golden age of classical technique. The sport had not yet been exposed to the diversity of body types and wrestling traditions that would arrive from overseas. What it had instead was a deep pool of technically accomplished Japanese wrestlers operating within a shared aesthetic of belt-based sumo: patient, controlled, and deeply attentive to leverage and positioning.

The era produced several exceptional yokozuna, but one stands entirely apart. Futabayama Sadaji compiled a winning streak of 69 consecutive bouts between 1936 and 1943 — a record that has never been approached in the eight decades since. He won at a time when tournaments were still five days long and the total number of bouts in a career was far smaller than today, but the statistical dominance his streak represents is staggering by any measure.

Rebuilding and the expansion of the basho

The immediate postwar period was one of institutional reconstruction. Tournaments had been disrupted by wartime conditions, venues had been damaged or destroyed, and the sport needed to reestablish itself within the framework of occupied Japan. The JSA adapted quickly, positioning sumo as cultural heritage rather than nationalist spectacle — a rebranding that the occupation authorities accepted without significant interference.

The most significant structural change of this era was the expansion of the tournament format. Basho grew from ten days to fifteen by 1958, and the number of annual tournaments increased from two to the current six by 1958. This expansion fundamentally changed the arithmetic of sumo careers — more bouts, more tournaments, more opportunities to accumulate records — and created the statistical framework within which modern sumo history is still understood.

The era's defining figure was Tochigiyama Moriya, who had actually dominated the immediate pre-war period, and Tochinishiki Kiyotaka, who bridged the wartime and postwar eras with a longevity that spoke to extraordinary physical resilience. But it was the rivalry between Tochinoshin and Wajima in the 1970s that gave the expanded tournament format its first genuinely compelling narrative.

Wajima and the golden left hand

Wajima Hiroshi was the dominant figure of 1970s sumo — a wrestler whose left-handed underarm grip was so powerful and so reliably deployed that it became his defining characteristic. Nicknamed "the golden left arm," he won fourteen tournament championships between 1972 and 1981 and was one of the most technically refined belt wrestlers of the modern era. His rivalry with Kitanoumi Toshimitsu — a more physically imposing wrestler who favoured pushing techniques — gave the decade a genuine dramatic tension that drew large television audiences and established sumo as appointment viewing in the NHK era.

Hawaii changes sumo forever

The arrival of Takamiyama Daigoro — born Jesse James Wailani Kuhaulua in Maui — in the late 1960s introduced something entirely new to sumo: a body type and athletic background that the sport had never encountered. Tall, massively built, and trained in the American wrestling tradition, Takamiyama became the first foreign-born wrestler to win a top division tournament in 1972. He was not the dominant figure of his era, but he opened a door that would prove impossible to close.

The wrestlers who followed from Hawaii in the 1980s and 1990s — Konishiki, Akebono, Musashimaru — were not curiosities. They were forces of nature. Konishiki at his peak weighed over 280 kilograms and possessed a combination of raw power and surprisingly refined technique that made him genuinely dangerous to anyone in the sport. The debate over whether he should have been promoted to yokozuna remains one of the most contentious in modern sumo history.

Wakanohana and Takanohana — the brothers who defined an era

While the Hawaiian wrestlers were reshaping sumo's competitive landscape, a parallel story was unfolding that would capture Japanese public attention at a level the sport had not seen since Futabayama's pre-war dominance. Two brothers — sons of former Yokozuna Wakanohana Kanji I — rose simultaneously to sumo's highest rank and became the defining cultural phenomenon of 1990s Japan.

Wakanohana Masaru and Takanohana Koji — known universally as Waka and Taka — were sumo royalty by birth but earned their prominence through genuine ability. Takanohana in particular was regarded at his peak as technically close to perfect: a belt wrestler of extraordinary precision, exceptional lower-body strength, and tactical intelligence that made him nearly impossible to defeat when fully healthy. He won 22 tournament championships and was promoted to yokozuna in 1994. His older brother Wakanohana won three championships and reached yokozuna in 1998.

The cultural impact of the Waka-Taka era exceeded anything sumo had produced in the television age. NHK sumo broadcasts regularly drew ratings above 50% during the brothers' peak years — figures that rival the largest television events in Japanese broadcasting history. Their contrasting personalities amplified the drama: Takanohana private, intense, and seemingly invulnerable; Wakanohana more outgoing and beloved for his fighting spirit against physically superior opponents. Their bouts against each other and against the Hawaiian wrestlers drew the entire country to the television.

The era ended gradually through injury — both brothers were plagued by knee problems in their later careers — and was effectively over by the early 2000s as the Mongolian wrestlers arrived. But the Waka-Taka boom established a template for sumo's popular appeal that the sport has struggled to replicate, and the television ratings of that period remain the benchmark against which all subsequent eras are measured.

The Mongolian era

The emergence of Mongolian wrestlers as sumo's dominant force in the early 2000s was not gradual. It was a rapid, total transformation of the competitive landscape. Asashoryu Akinori, promoted to yokozuna in 2003, was the first — a ferociously aggressive wrestler whose intensity and competitiveness set a new standard for what top-level sumo looked like. He was followed within a few years by Hakuho Shō, and the two defined an era that lasted, in Hakuho's case, until his retirement in 2021.

The statistics of Mongolian dominance are almost difficult to comprehend. Between 2003 and 2021, Mongolian wrestlers won the majority of the 108 tournaments held. Hakuho alone won 45 — more than any wrestler in history by a significant margin. The previous record, held by Taiho Koki, was 32.

After Hakuho — the current era

The years following Hakuho's 2021 retirement produced a period of competitive flux before the emergence of two wrestlers who now define the sport's present. Terunofuji Haruo — whose extraordinary comeback from near-retirement due to severe injury became one of sumo's great stories — held the lone yokozuna rank from 2021 until his retirement during the January 2025 tournament. His departure opened the door for a new generation, and two wrestlers have since risen to fill the void in rapid succession.

Hoshoryu Tomokatsu was promoted to the 74th yokozuna on January 29, 2025, after winning the Hatsu basho in a three-man playoff following a dramatic late-tournament run. The nephew of former Yokozuna Asashoryu, he brings to the rank an athletic, throw-heavy style — his uwatenage is among the most spectacular in the modern era — alongside the fierce competitive instincts of his famous uncle. His promotion marked the beginning of the post-Terunofuji era. Onosato Daiki followed in May 2025 as the 75th yokozuna, promoted after winning back-to-back championships at ozeki. A product of collegiate sumo under oyakata Kisenosato at Nishonoseki beya, Onosato arrived in professional sumo with extraordinary credentials and fulfilled them — reaching the top division in January 2024 and winning his first championship in just his seventh tournament, a record pace. His style is physical and relentless, combining powerful forward pressure with exceptional reading of the tachiai.

The two yokozuna present a compelling contrast — Hoshoryu the dynamic throw specialist with a sumo dynasty in his bloodline, Onosato the collegiate prodigy representing a new generation of academically developed wrestlers. Their rivalry is the central narrative of the current era. Both have been hampered by injuries in 2026, maintaining the sport's characteristic tension between the demands placed on the rank and the physical reality of sustaining elite performance across six tournaments a year.