Who Was the First Judo World Champion in History?

The first World Judo Champion in history was Shokichi Natsui of Japan, who won the inaugural World Judo Championships on May 3, 1956, at the Kuramae Kokugikan in Tokyo. Natsui, a Japanese police officer holding the rank of 6th dan, defeated 30 other competitors from 21 nations in a single-day open-weight tournament to claim the first world title the sport had ever awarded. His path to the final took a total of 63 seconds of combined mat time across four matches — one of the most dominant tournament performances in the event’s opening era. The identity of the first world champion matters beyond the historical footnote: it establishes who Geesink was actually defeating in 1961 when he ended Japanese dominance, contextualizes what the sport looked like before weight classes, and tells us what the founding generation of competitive international judo produced at its best.

Shokichi Natsui: Profile and Path to the Championship

Shokichi Natsui was a Japanese judoka and police officer who held the rank of 6th dan (rokudan) at the time of the 1956 World Championships. His opponent in the final, Yoshihiko Yoshimatsu, was a colleague — also a policeman — who held the rank of 7th dan (nanadan) and was 36 years old. Both represented the established core of Japanese judo’s competitive and institutional elite: practitioners from the profession most associated with judo training in Japan, both ranked among the highest dans at the event. The 1956 championship brackets reveal Natsui’s competitive dominance with unusual specificity. His match times going into the final were: Round 1 vs. Cambodia — 3 seconds, won by seoi-nage (a shoulder throw); Round 2 vs. Johannsen (Denmark) — 8 seconds, won by tai-otoshi; Round 3 vs. Woodrey (Belgium) — 44 seconds; Semifinal vs. Henri Courtine (France) — 8 seconds, won by tai-otoshi. Total pre-final mat time: 63 seconds across four matches. These times document a judoka whose entry speed and technical precision were so superior to the rest of the field that his opponents had no time to establish competitive engagement before the match was over.

The Final: Natsui Defeats Yoshimatsu

The final between Natsui and Yoshimatsu was an all-Japanese contest between two police officers, both among the highest-ranked judoka at the championship. Yoshimatsu had reached the final by defeating Anton Geesink of the Netherlands in the semifinal — eliminating the Dutch competitor who would go on to become the first non-Japanese World Champion five years later. Natsui won the final to claim the first World Championship gold in the sport’s history. The championship’s format — 31 athletes from 21 nations competing in a single open-weight draw — meant that the gold medal was genuinely the world championship in the fullest sense: no weight classes, no separate divisions, one champion crowned from the entire international field. Natsui’s 1956 win is thus not merely the first championship gold in one weight category — it is the first time any athlete from any nation was named the best judoka in the world by the newly formed International Judo Federation.

The 1956 Championship Field and What Natsui’s Victory Represents

The 31 athletes who competed at the 1956 World Championships came from 21 nations, with European representation alongside Japan providing the competitive depth of the field. The most significant competitor in retrospect was Anton Geesink of the Netherlands — 21 years old, holding 3rd dan, who placed in the top four of the world’s first judo championship in his first international appearance at this level. Geesink would return five years later to Paris and defeat Japan’s representative to win the 1961 World Championship — the most consequential result in the history of World Championship upsets. Henri Courtine of France, who won bronze alongside Geesink and who lost to Natsui in the semifinal in 8 seconds, represented the strength of French judo in the early international era — a tradition that France has carried forward to the present day. Natsui’s victory in this specific field established the baseline for the sport’s first world hierarchy. His 63 seconds of total pre-final match time make him one of the most decisive champions in the event’s opening decade. The full context of the 1956 championship — including the organizational history, venue, and format — provides the complete picture of what Natsui’s victory was the climax of.

Natsui’s Legacy Compared to the Modern Record

Shokichi Natsui held the title of first World Judo Champion for a specific moment in history and then receded from the record books as the championship grew. By contrast, Teddy Riner’s 11 World Championship golds represent the modern extreme of what world championship accumulation looks like after 60+ years of the sport’s competitive expansion. Between Natsui in 1956 and Riner in 2023, the world championship produced dozens of multi-time champions — figures like Willem Ruska (Netherlands), David Douillet (France), Yamashita Yasuhiro (Japan), and Inoue Kosei (Japan) — each building on the competitive infrastructure that Natsui’s inaugural win made possible. What Natsui holds that no subsequent champion can share is the uniqueness of being first: the first time the sport decided, under formal global competition, who was the best judoka in the world. The specific techniques he used — seoi-nage and tai-otoshi deployed at 3- and 8-second execution windows — were the tools that won the first world title, in a format and competitive context that no longer exists but that established every rule, tradition, and expectation that followed.

Frequently Asked Questions

Who was the first judo world champion in history?

Shokichi Natsui of Japan was the first World Judo Champion in history, winning the inaugural World Judo Championships on May 3, 1956 at the Kuramae Kokugikan in Tokyo. He defeated compatriot Yoshihiko Yoshimatsu in the final of the single open-weight category. There were no weight classes at the 1956 championships — Natsui was the sole world champion from a field of 31 athletes representing 21 nations.

How dominant was Natsui’s path to the 1956 world title?

Extremely dominant. Natsui reached the final in a combined mat time of 63 seconds across four matches: 3 seconds (Round 1, Cambodia), 8 seconds (Round 2, Denmark), 44 seconds (Round 3, Belgium), and 8 seconds (Semifinal, France’s Henri Courtine). His primary techniques were seoi-nage (shoulder throw) and tai-otoshi, deployed at entry speeds that gave opponents no time to respond.

Who else won medals at the 1956 World Judo Championships?

The silver medal went to Yoshihiko Yoshimatsu (Japan), who lost to Natsui in the final. Bronze medals went to Anton Geesink (Netherlands) and Henri Courtine (France). Geesink, 21 years old and ranked 3rd dan at the time, would go on to become the first non-Japanese World Champion in 1961 — the result is widely regarded as the most significant upset in the event’s history.

Were there weight classes at the first Judo World Championships?

No. The 1956 World Championships were held in a single open-weight category — all 31 competitors from 21 nations fought in the same draw regardless of body size or weight. Weight classes were not introduced until the 1965 World Championships in Rio de Janeiro, when three weight divisions (-68 kg, -80 kg, +80 kg) were added alongside an open-weight category.

What was Shokichi Natsui’s judo rank when he won the world title?

Shokichi Natsui held the rank of 6th dan (rokudan) at the time of the 1956 World Championships. His opponent in the final, Yoshihiko Yoshimatsu, held the rank of 7th dan (nanadan) — a higher grade. Both were Japanese police officers. Anton Geesink, who won bronze, held 3rd dan at the time.