The Data Void of Vietnamese Martial Arts and How Japan Measures What Cannot Be Measured

Phan Dinh Phung Arena, a weekend evening in Ho Chi Minh City. The lights above the ring are brighter than they need to be, bright enough to catch every drop of sweat hitting the canvas. A twenty-two-year-old fighter has just won the first professional bout of his career. The crowd erupts for four seconds, then almost in unison looks down at phones to replay the finish on the big screen. I am sitting in the fourth row with a notebook. Forty seconds after the referee lifts the winner's hand, the fighter walks to his corner, sits down, and lets both arms drop. From the moment he sits to the moment he can lift a water bottle, twenty-two seconds pass. His coach says five sentences to him; he nods once, eyes fixed on the floor. No television camera points toward the corner for any of it. That night I counted two hundred and fourteen entries into striking range across eight fighters. I was the only person in the building doing that. The organisers recorded the result, the finishing time, and the winner's name. Everything else, the part that actually builds a fighter's career, does not exist in any file. "When everyone looks at the win, I look where the weakness is hidden." I have carried that sentence as a professional rule through more than a decade of writing about martial arts in both Vietnam and Japan. Before talking about measurement, one thing must be stated clearly, because most discussions of Vietnamese martial arts skip it: martial arts is not a single sport. It is an umbrella far too wide. Under it sit at least two worlds with different natures and different definitions of victory. The first world is modern combat sport: boxing, MMA, kickboxing, Muay Thai, wrestling, grappling. There, victory is defined by international rules, judged by referees, recorded on public scorecards, and owned by federations accountable for results. The second world is traditional martial arts, forms and demonstration. There, the winner is decided by a panel of judges sitting outside the ring, scoring criteria that include difficulty, posture, rhythm and spirit. Those criteria are not wrong, but they cannot be converted into a shared scale across tournaments. The label martial arts, as used in international data classification systems, merges these two worlds into one. That merge is the starting point of every analytical problem. Nobody can build a comparative index for a field in which the definition of victory changes from event to event. I came to this by accident. In 2026, as a second-year sports management student in Tokyo, I interned in the data analysis unit of a digital platform covering Japanese football. My job was to count everything: pressing actions, passes by zone, seconds the ball spent in each third. In the evening I went home and turned on a boxing match. No boxes appeared after each punch. No percentages. Just two people and a referee. That asymmetry followed me through my career. Football has hundreds of metrics; martial arts has almost none. Not because martial arts is simpler, but because nobody is responsible for collecting. SCORING WHAT NOBODY SCORES In 2026, two American analysts built a punch-counting system for boxing broadcasts. It records punches thrown and punches landed for each fighter, updated round by round. Since then, viewers can watch a boxer win four rounds, lose amplitude, and understand why the eighth round flipped. In MMA, a similar statistics system was adopted by the world's largest promotion in the early 2010s, adding takedowns, takedown defence and control time. Vietnam has no equivalent. A domestic professional boxing bout is streamed live, with commentators, a crowd and sponsors' logos on the ropes, and not a single statistic published afterwards. I have counted by hand many times just to write a piece, and always wondered why that remains an individual's job. With traditional martial arts the problem runs deeper. National traditional martial arts festivals score forms, sparring and sometimes musical weapons routines. Scores are published on a numeric scale, ten or fifteen points, but the allocation between criteria shifts between panels. An outsider cannot explain why one delegation wins gold at one event and places fifth at another with the same form. That is a governance problem, not a technical one. Inconsistent judging criteria are the first reason Vietnamese martial arts data cannot accumulate across years. Japan offers a useful contrast. The Japan Karate Federation and the World Karate Federation built a kata scoring framework with two score groups, technical merit and athletic merit, assessed by a panel of judges. The framework remains contested, but it exists in writing, is translated into many languages, and is applied identically from Tokyo to Cairo. A karate athlete can therefore compare scores across continents. Vietnamese traditional martial arts have not managed that, despite a far larger number of styles and practitioners. STRENGTH, WEIGHT AND WHAT IS HIDDEN BEHIND THE TOWEL Martial arts is the only sport in which athletes deliberately damage an opponent's head to win. Medical and conditioning data should therefore be the most protected category. In Vietnam, it barely exists. Weight is the clearest example. A young fighter cutting five kilograms in four days before weigh-in is routine in many gyms. Weigh-ins happen twelve to twenty-four hours before the bout, with no hydration testing, no urine specific gravity measurement, no post-weigh-in monitoring. When I ask coaches why, the most common answer is: it has always been this way. America paid for that habit. In 2026, three collegiate wrestlers died within a short period, all linked to extreme weight reduction. The national college sports association then rebuilt its weight management rules entirely: urine testing, individually determined minimum safe weights, and a ban on repeated weigh-ins. A US wrestler today cannot compete below a safe threshold established by his own body at the start of the season. Vietnam has no equivalent mechanism, even in sports that have turned professional. I once watched a boxer enter the ring with slightly trembling hands and unfocused eyes after a two-day cut. He lost in the third round. In the papers, the reason given was inexperience. Nobody mentioned the two days. In Japan, where I live and work, the boxing commission enforces mandatory suspension after any knockout defeat, with the length increasing according to the number of career knockouts suffered. A fighter stopped three times in a short window faces additional medical examination or loses his licence. The rule can be clumsy and can be gamed, but it exists in writing and leaves a trace in the fighter's file. That difference has tactical consequences, not decorative ones. A Japanese fighter who knows a knockout loss costs thirty days or more defends differently in the final round. He is not fighting for pride; he is protecting his right to compete. Medical data, once recorded, becomes part of tactics. I believe in data, but I write about what data cannot measure. WHO OWNS THE DATA OWNS THE DISCIPLINE In Japan, every major martial arts organisation keeps its own fighter records, and those records carry clear commercial value. When a broadcaster buys rights, it is not only buying images. It is buying the ability to tell stories with numbers: this fighter wins what percentage of rounds with at least three strikes landed; how that fighter reacts after taking a body shot. In Vietnam, martial arts data sits in three places that never talk to each other. The federation holds registration records and event results. Clubs keep training logs, usually on paper. Individual fighters keep memory and self-shot phone video. There is no central repository, not even a complete list of professional bouts held in a single year. The commercial consequences are specific. Sponsors want to know return on investment; they need reach and engagement metrics per fighter. Broadcasters want to price rights; they need to know which fighter draws more viewers and for how many minutes. Insurers want to set premiums; they need injury data by discipline, weight class and annual bout count. Without data, every negotiation drifts toward sentiment, and the fighter always pays for it. In a working session with a sports content team in Hanoi, I set a small exercise: in ten minutes, list ten active Vietnamese professional fighters with their win-loss records and weight classes. Nobody in the room finished. The best effort produced four names, each carrying a question mark about accuracy. Data is not spreadsheets. Data is power. When a discipline has no data, decisions about it are made by people who hold relationships rather than by people who hold results. STORIES FILL THE GAP Where data is missing, narrative moves in. That is not entirely bad. Because data is missing, Vietnamese martial arts retains a thick cultural layer: stories of village masters, of duels nobody filmed, of forms passed down orally across generations. But when narrative systematically replaces data, it starts causing damage. Fighters become legends before they have enough bouts to be tested. Defeats are explained by fate, health or referees. Technical flaws fixable in three weeks of training go unfixed, because nobody can see them. In 2026, when the pandemic halted competitions worldwide, I ran an independent research project with fifteen retired professional footballers, asking what it felt like to play in empty stadiums. The result surprised me: most said artificial crowd noise pumped through speakers disrupted their rhythm more than it helped, because it did not react to the real flow of the match. One told me he only knew whether he was playing well by listening to his own breathing. When the stadium is empty, the person inside finally speaks. I kept that conclusion and carried it into martial arts. What I look for is not a perfect statistical table, but traces only humans leave behind: breathing between rounds, how a fighter sets his feet before being driven to the ropes, the pause before he commits to a final strike. These do not replace data. They point to where data needs to be recorded. WHAT JAPAN MEASURES The lesson from Japan is not its technique. It is its culture of record-keeping. Judo entered the Olympic programme in 2026, when the Games were held in Tokyo. Karate arrived much later, at Tokyo 2026, and was dropped for Paris 2026. Boxing has been an Olympic sport since 2026. Taekwondo joined in Sydney 2026. Looking at that timeline, one might assume combat sports advance through achievement. In reality, they advance through files. Muay Thai is the most recent example. It was added to the European Games programme in Krakow in 2026, a significant step outside Southeast Asia. To get there, international Muay Thai bodies had to standardise weight classes, medical procedures and result recording over several years. No files, no place. The karate case is more instructive. Karate has a strict grading system, written scoring criteria and nearly a century of organised history in Japan. Yet it was still removed after a single Olympic appearance. The lesson: good data helps a discipline gain recognition, but does not protect it from political decisions at the International Olympic Committee. Data is necessary, not sufficient. For Vietnam, the gap is one level wider. Before considering entry into continental or global competition, the most basic question must be answerable: how many official bouts has a Vietnamese fighter contested in his career, and how many did he win? Today, the most accurate answer is: nobody knows for certain. I once sat in a meeting in Tokyo where a television producer presented a data sheet on a Japanese fighter covering thirty-seven bouts, classified by opponent, venue, result and finishing time. He then turned to me about a Vietnamese fighter the team wanted to profile. I opened my notebook, and it held seven recorded bouts, with a note that two others could not be verified. The room went quiet for a few seconds. Then he said something I have never forgotten: we cannot make a film about a man with no past. Without data, a career becomes invisible. And an invisible career cannot be told, cannot be paid, cannot be protected. THE COUNTERINTUITIVE POINT There is an easy conclusion to draw from all this: collect as much data as possible. I do not believe it. Vietnam's martial arts problem is not the volume of data. It is the absence of agreement on what counts as a win. When two tournaments in the same year can score the same form differently, multiplying metrics tenfold only multiplies confusion tenfold. Nor do I believe every martial art needs to be quantified the same way. Traditional martial arts hold value in lineage, ritual and decades-long teacher-student relationships. Measuring that with spreadsheets destroys it. The sophistication lies in separating the two kinds of value: the competitive side must be measured as rigorously as any professional sport; the lineage side must be preserved through other mechanisms, not medals. Even comparing Vietnamese and Japanese martial arts easily falls into cliche. There is no truth in the idea that Japanese martial arts are disciplined while Vietnamese ones are intuitive, or the reverse. I have trained in Vietnamese gyms where schedules were enforced to the minute, and I have seen Japanese sessions cut short because a coach wanted his students relaxed. The genuinely tactical difference lies elsewhere: in Japan, the default assumption is that every session, bout and injury must leave a trace on paper. In Vietnam, the default is to keep it in the head. A personal memory, however good, disappears when the person does. A data file does not. Breaking convention does not need a loud voice. It needs evidence heavy enough. WHAT TO DO NEXT Within the next three years, if a Vietnamese martial arts organisation does only one thing, I hope it builds a national competition archive, in an open format, run by a group independent from event organisers. No expensive software is required. What is required is a single standard for recording a bout: who, when, where, at what weight, ending how, after how many rounds, and how many days the fighter needed before returning to training. If that archive exists for ten years, Vietnam will have something it does not have now: a searchable history, a foundation for tactical analysis that does not depend on a narrator's memory, and, more importantly, a way for unknown fighters to be seen while they are still alive, rather than twenty years after retirement. Sport stories do not live only in the match. They live in the people inside the silence, and those people can only be heard if someone is willing to sit down, open a notebook, and write.