The Long Road and the Depth of a System: Vietnamese Athletics Through the Lens of Japan's Marathon Machine

On the night of January 2, my apartment in Nishi-ku, Osaka, was lit only by the television screen. Outside, the temperature had fallen below five degrees Celsius. On the national broadcaster, twenty-one university track teams lined up in front of Tokyo Station, waiting for the starter's gun of the Hakone Ekiden. No foreign superstar was mentioned. No million-dollar contract appeared on the graphics. There were only twenty-year-old students and a 217.1-kilometre journey split into ten stages, from Otemachi to Lake Ashi and back again. A week later, I reopened the marathon results of a Southeast Asian nation. The same distance, 42.195 kilometres. The same people who had given their youth to the road. But when I placed the two sets of numbers side by side, I sat still for a long time, because the gap was not in the speed of the leader. It was in the number of people behind him. That is the starting point of every analysis I have written over twenty-nine years. Numbers never lie; the liar is the person who chooses how to read them. The backdrop of this story is not a final. It is a system. Japan does not produce a single marathon champion for the whole country to admire. It produces a running class so dense that a place on the national team is sometimes harder to win than a continental medal. To understand why, you have to work backwards from the result to the structure, not from inspiration to achievement. Ekiden, the long-distance relay, is the spine of this culture. The Hakone Ekiden is merely the most visible peak of a much deeper pyramid: junior-high ekiden, high-school ekiden, university ekiden, then corporate ekiden. Each tier is a filter, and each filter keeps a group of people fast enough to keep being nurtured. When a country turns the relay road into part of the school and work calendar, it does not need to wait for a genius. It only needs to wait for quantity to turn into quality. On the other side, Vietnamese athletics has outstanding individuals and memorable moments. Bui Thi Thu Thao won long-jump gold at the 2026 Asian Games with 6.55 metres. Nguyen Thi Oanh collected multiple SEA Games golds. Hoang Nguyen Thanh won the men's marathon at the 32nd SEA Games. These are real peaks, impossible to deny. But a single mountain does not make a range. And this is where the work of an analyst begins: measuring depth, not just height. In 2026, I worked for a large betting exchange in Osaka, when new sports platforms were racing to publish opinion-driven commentary. I released a study comparing the PPDA index of eighteen J-League teams and showed that Shimizu S-Pulse had scored 11.3 goals fewer than the expected-goals model over a season. The media called it bad luck. The numbers called it a structural hole in central midfield. The club finished fourteenth, exactly as the model predicted, instead of the eighth place the story had been selling. That experience taught me a principle I apply to athletics as well: when everyone looks in one direction, I start examining the empty space behind their backs. So what is the empty space behind Vietnam's athletics medals? Let us begin with the simplest measurement, the one the media rarely bothers to make. If you rank all of a country's male marathon runners by personal best and plot the distribution, you will see two completely different geometries. The first is a sharp spike: two or three names rise, and the rest drop vertically to the ground. The second is a plateau: a summit not much higher, but beneath it lie hundreds of people within a narrow performance band. Japan belongs to the second. Most Southeast Asian nations, Vietnam included, belong to the first. This difference matters more than any national-record comparison. A spike can be built by one exceptional individual and one good coach. A plateau can only be built by a system. And in distance running, the system decides how many of your athletes are at the front of an international race, not how fast one of them is. Japan has the largest number of male marathon runners under 2 hours 10 minutes of any nation in history, a figure that keeps rising every season and far outstrips any other country. Their men's national record, 2:04:56 set by Kengo Suzuki at Lake Biwa in 2026, is only the visible tip. The submerged part is the dozens, the hundreds of runners in the 2:08 to 2:12 band, people ready to replace one another in every race, every distance, every weather condition. This is the point I want to linger on, because it is the most easily misread. When someone says Japan is strong because it has a "running culture", I hear an evasive answer. What people call culture is often only the surface paint of a deeper order, and that order can be measured in money, in calendars, and in people. Let us peel the paint away. The first layer is financial flow. In Japan, corporate ekiden turns running teams into a division of the company. A car manufacturer, an insurance firm, an electronics maker can all maintain a track team with full salaries, housing, doctors, nutritionists and dedicated coaches. Athletes do not have to worry about food and shelter after retirement, because they are full-time employees. This structure turns running from a personal gamble into a stable profession. In Vietnam, most track athletes depend on local sports budgets, national training centres and medal-based bonuses. This is a model that can produce peaks, because it concentrates resources on the most promising individuals. But it rarely produces depth, because most resources are poured into the person at the top of the list, not into the tier behind them. When an athlete is injured or retires, the gap is not filled immediately, because the next person was never raised to be ready. The second layer is competition density. A mature marathon runner needs races to learn pacing, to get used to being dropped at kilometre thirty, to understand how the body responds when the course climbs. Japan stages hundreds of marathons a year, from large mass events to professional races with strict entry standards. That density creates a continuous laboratory. Vietnam has a number of fast-growing mass marathons, but the number of races good enough for a professional to use as a springboard to the international stage remains thin. The consequence is that Vietnamese athletes often enter an international race with very little collision experience at exactly the right distance and intensity. This is a technical variable, not a lament. The third layer is coach density. To raise a class of athletes, you need a class of coaches with expertise in training physiology, lactate threshold, periodisation. In Japan, this system is replicated through universities and corporate teams. In Vietnam, high-quality knowledge tends to concentrate among a few experts, and that knowledge is not easily replicated without a retraining system. These three layers add up to what I call systemic depth. And systemic depth cannot be bought with a contract, nor copied with a short training camp. Here I must state clearly something I always remind myself of in every analysis: correlation is not causation. The fact that Japan has a corporate-team system and marathon depth does not prove that merely copying the corporate-team model will give Vietnam similar depth. Other variables intervene between the two ends of the correlation, and the careless writer ignores them to get a tidy story. The first variable is population scale and the reach of school sport. Japan has tens of thousands of students running ekiden each year, and that number creates an enormous funnel. A country with fewer participants cannot expect the same thickness at the output, no matter how similar the model. This is a physical limit, not a failure of will. The second variable is the retirement structure. A system is only sustainable when the person leaving the road has somewhere to go. If an athlete knows that after thirty they can become a coach, a strength specialist or a team manager, they will dare to commit more when young. If not, they choose a safer path, and the country loses people who should have stayed in the sport. The third variable is time. Japan built this system over decades, with adjustments and failures no textbook records. Vietnam is at a different point on the same curve. Comparing two different points on a curve and then concluding something about human nature is a basic logical error, and I have seen it repeated far too often. So what can actually be transferred from Japan to the Vietnamese context? Based on my experience watching matches and track meets, the most transferable thing is not money but the way of asking questions. Japanese coaches do not ask "how do we get one champion". They ask "how do we get twenty people good enough to push each other forward". The second question is harder, but it is the one that creates depth. A country can organise a regular internal meet, publish all results and times openly, and let competition do the rest. This needs no huge budget, only discipline and transparency. In June 2026, I sat in the newsroom of a Japanese sports channel during the World Cup in Russia and mispronounced the name of a Japanese national-team midfielder three times in the first half. I thought it was the mistake of my life. But what kept me awake was the goal conceded in the thirty-ninth minute: tracking data showed the team's shape stretched to an average of forty-two metres, completely breaking the pressing structure. I rewatched all the group-stage footage for a month to correct it. The lesson I drew, and the lesson for anyone who wants to analyse athletics seriously, is this: a mispronunciation is only surface. What lies beneath is whether you can see a system at work. Mispronouncing a name is not the error; the failure is not seeing the shadow of a system. Applied to Vietnam, that means do not merely count medals. Count the number of athletes who can run under a given time threshold, across all age groups. Count the number of races a young athlete can enter in a year. Count the number of coaches who can read and interpret physiological data. Those three numbers, added together, forecast the future better than any medal table. I know a familiar objection: Vietnamese athletics lacks facilities, funding, conditions. This is true. But it is not the whole story, and this is where I want to place a counter-intuitive angle. When a system lacks resources, the natural response is to concentrate resources on the person most likely to win a medal. This is a rational short-term decision, and it explains why Southeast Asian nations often have peaks but lack depth. But that very concentration reproduces the spike structure I described at the start. You pour money into the leader, the second-best quits because they see no future, and ten years later you again have only one leader, older and lonelier. In other words, the optimal strategy for one medal is the enemy of the optimal strategy for one generation. This is a paradox very few small sporting nations dare to face head-on, because facing it means accepting the sacrifice of some short-term results in exchange for a long-term foundation. There is a way to test this paradox with data, and it is fairly simple. Take a nation's marathon runners over ten years, sort them by personal best, and see how the slope of the distribution curve changes over time. If the slope flattens, the system is thickening. If the slope stays sharp and merely shifts right, you have better individuals but not a better system. These two scenarios look identical on a medal table but differ completely in ten-year prospects. I have run this test on public data from several Southeast Asian countries over many years, and the results are fairly consistent: most are in the second scenario. National records improve, but the number of people within a competitive performance band barely rises. This signals that resources are flowing to the top of the pyramid rather than the base. Here I want to return to a concept I carried from my old profession, watching athletics, into the analysis of organisations in general. In endurance training, people distinguish three variables: volume, intensity and density. Volume is total kilometres. Intensity is the speed at which you run them. Density is how often you repeat. An amateur runner often increases volume, feels progress, then gets injured because they ignored recovery density. A nation's athletics operates on the same logic. Volume is the number of participants. Intensity is the quality of the leaders. Density is how often they race and are tested. These three must rise together. If only intensity rises, you get one star and an injury ward. If only volume rises, you get a mass running movement but no one at the international front. Sustainability comes from keeping the three balanced, and that is the work of a system, not an individual. Recovery is never a miracle; it is only something you already saw in the data three months earlier. This is true of an athlete after injury, and equally true of a sport after a cycle of decline. An era does not begin with technology; it begins with a question sharp enough to cut through the rut. For Vietnamese athletics, that question may not be how to win one more SEA Games gold. It may be: over the next five years, how many marathon runners under 2 hours 20 minutes do we want, and who will be the twentieth name on that list? The answer to the second question is far harder, and precisely for that reason it is more useful. When I look again at the two sets of results that opened this piece, I do not see one country losing to another. I see two different stages of the same process. Japan went ahead long ago and paid the price in decades of experimentation. Vietnam is at a point every nation has passed through, and what decides the outcome is not the speed of the leader but the width of the crowd behind him. Every shift in the odds is a heartbeat; I can only hear it when I put my ear to the ground of data. In athletics, that heartbeat is not in the national record. It is in the number of runners behind that record, the ones nobody reports on, yet they are the ones who will decide the next decade.