The Data Gap in Women's Volleyball: When the Perfect Pass Goes Uncounted

On the stands of a small arena in Osaka, I held the post-match stat sheet and realized I was looking at a nearly blank page. The match had lasted five sets, produced rallies that made the whole hall stand up, and featured a libero who received serve some thirty times without letting the ball touch the floor in zone six even once. Yet the sheet recorded only a handful of lines: the score, the errors, who scored the most. No perfect-pass rate, no count of organized second balls, no rotation index, nothing I could tell the young players about how a perfect pass had decided the match. I sat there for a long time, staring at the scoreboard, wondering: if women's volleyball data is this thin, who will tell the real story to the next generation? The first questions I was ever afraid of have become the stories I tell the young players now. I used to fear that if I spoke about this gap, people would say I was asking for too much, raising an issue that did not need raising. But the longer I stand inside women's volleyball, the clearer it becomes: the blank sheet I held in Osaka is not a small matter. It is part of a larger story about how the world treats this sport. Volleyball is a game in which every point passes through at least two pairs of hands before the ball touches the ground. A goal in football can be an individual's moment, but a volleyball point is almost always the product of a chain of decisions: who receives serve, where the second ball goes, who attacks, who draws the block, who covers. Volleyball, then, runs on data more naturally than almost any other sport. And yet the paradox is this: the more it needs data, the less women's volleyball is recorded in full. Based on my experience watching matches over many years, I can state something uncomfortable: most women's volleyball matches at club level and at regional national-team level are recorded with a minimal statistics system. Men's competitions have rotation indices, perfect-pass rates, attack efficiency by net zone, and set distribution by situation. Women's competitions usually have only points, errors, and a few aggregate figures. This gap is not because women play worse. It exists because of where people choose to put cameras, whom they choose to hire as recorders, and what they choose to sell as broadcast rights. I have a habit of staying after every match to redraw the reception system by hand. I count every serve, every libero position, every time the setter has to leave the ideal spot because the first pass was too far off the net. In a recent match in the Japanese domestic league, I counted fourteen out-of-system attacks by the away team in the first two sets alone, while the official sheet recorded only total attack points. Fourteen attacks in a passive situation, with no tactical option, relying purely on individual ability. That was the entire story of the match, and it was completely invisible on paper. What troubles me most is the effect of this invisibility on the players themselves. When I asked a young setter why she thought she had not been called up to the national team, she said it was probably because she did not score many points. A setter judging herself by points scored. The data system she had been exposed to had taught her that. No sheet showed her how many quality second balls she had organized, how many average first passes she had turned into structured attacks. She could not see her own real value because no one had recorded it. The season froze, but voices never freeze. I remember those months without matches, when I started calling women players just to ask how they felt when their numbers disappeared from every bulletin. They told me the feeling of being forgotten did not come from not being on television, but from people not bothering to count what they did. To be miscounted hurts, but to be uncounted is colder still. In the rest of this article, I want to go deep into the technical story behind that gap. Because I believe that to defend women's volleyball, we cannot speak only in emotions. We must speak of reception systems, of rotations, of balls outside our control, of how a team organizes its attack when everything collapses. That is where the true value of this sport lives, and that is where data must arrive first. Women's volleyball does not need a savior, only someone willing to sit down and listen. And this time, I want to listen through the numbers that no one has bothered to record. To understand why women's volleyball data is so thin, we must first understand how volleyball is recorded. Unlike football, where a player may touch the ball dozens of times per match, volleyball is a sport of short but densely decisive contact chains. Each rally lasts a few seconds, but within those seconds there can be five to seven consecutive technical decisions. Because the density of decisions is so high, volleyball is an ideal sport for detailed data analysis. And precisely for that reason, the lack of data in women's volleyball is a systematic waste. The standard statistics system of professional volleyball usually revolves around a few core metric groups. The first is serving, including direct-ace rate, the rate of serves that pressure the opponent into a bad pass, and service-error rate. The second is reception, most importantly the perfect-pass rate, the share of first balls delivered to the ideal position allowing the setter to run the full attack menu. The third is setting, including distribution by position and the effectiveness of each organized attack option. The fourth is attacking, including success rate, efficiency, and point distribution by net zone. The fifth is blocking and defense, including stuff blocks, block touches that create counterattack chances, and dig success rate. At elite men's level, these five groups are usually recorded in full, sometimes split by rotation, by matchup, by critical-point situation. At women's level, especially in regional leagues and national-team matches outside major tournaments, usually only attacking and part of serving are recorded. This produces a distorted picture of the nature of the match. I once took part in a discussion with the organizers of a regional women's tournament. When I proposed adding a perfect-pass metric, the answer was that the budget did not allow hiring an extra recorder, and the broadcast rights did not require that metric. This is a very familiar vicious circle: broadcasters do not require it because viewers are not used to it, viewers are not used to it because they have never seen it, and they have never seen it because no one produces content from that data. Women's volleyball is stuck in the middle of that circle, and with every passing year the gap grows deeper. I do not want to paint a one-sided pessimistic picture. In Japan, where I live and work, the national women's league has made clear progress on data in recent years. Some major clubs have begun investing in detailed recording systems, sometimes hiring dedicated analysts. But these advances remain local, dependent on each club's budget, and have not yet become a common standard for the whole league. It must also be said plainly that the data gap in women's volleyball has a deeper cause than funding. It lies in how we define value. When a sport is valued by audience size, and audience size is determined by the number of matches broadcast, data becomes a tool of marketing rather than of understanding. People record what sells, not what matters. In women's volleyball, what sells tends to be spectacular attacks, while what matters is the quiet first pass that no one remembers by name. I learned this from the players themselves. A libero once told me she did not need praise, only to be remembered. She said that after every match, people asked her how it felt to save a ball, but no one asked how she had read the serve to stand in the right place. The recognition she longed for was not applause, but a line of notation showing that someone understood what she had done. Without that line, her work simply drifted away through the seasons. That is why I want to spend most of this article on the reception system. Because the first pass is the foundation of everything in volleyball, and it is also the thing most thinly recorded in women's volleyball. The reception system in volleyball is the way a team organizes three receivers (or two in some schemes) to handle the opponent's serve, aiming to deliver the ball to the setter in the best possible position. The quality of the first ball determines the entire attack plan behind it. A perfect first ball lets the setter run the full menu: quick middle, both pins, back-row, pipe. An average first ball, meaning the ball reaches the setter but far from the net or in a skewed position, forces the setter to narrow the attack menu to one or two options. A broken first ball, meaning the ball does not reach the setter in an organized position, pushes the team into an out-of-system attack. Yet in most women's volleyball stat sheets, these three levels are not distinguished at all. I once counted by hand and recorded the gap between the three levels in one specific match. The home team had forty-two serve receptions in total. Of these, fifteen were perfect, eighteen average, nine broken. The perfect rate was only about thirty-six percent. But when I looked at the official post-match sheet, I saw only total receptions and total errors. That thirty-six percent, the thing that actually explained why the home team lost in three straight sets, did not appear. The reception system in women's volleyball has an important tactical feature that I rarely see fully analyzed. It is a greater dependence on the libero and on the movement of the block. In women's volleyball, because average serve speed is lower and net height is relatively lower than in men's volleyball, teams often choose a strategy of serving into the mid-court area and the far corners to stretch the reception system, rather than trying for direct aces. This means the quality of the first pass in women's volleyball depends more on the whole system's ability to read the situation and move, not just on individual reflexes. In other words, women's volleyball is a sport where collective value in defense is higher, yet it is recorded by simple individual metrics. This is a fatal paradox. When you measure a coordinated system with individual numbers, you will always misunderstand that system. I want to tell a specific story to illustrate. In a match I followed in the Japanese domestic league, the away team used a two-receiver plus libero scheme. In the first set, the home team served repeatedly into the mid-court area, the overlap zone between two receivers' responsibilities. This is the area professional volleyball calls the contested zone, where two receivers must decide in an instant who takes the ball. The away team lost seven straight points, and the cause was not poor passing technique but scrambled communication between the two receivers. The stat sheet recorded seven points lost, but not seven moments of hesitation. What was interesting is that in the second set, the away team adjusted by having the libero shift further left, narrowing the contested zone, and their perfect-pass rate rose markedly as a result. This was a purely data-driven tactical adjustment, yet no stat sheet recorded it. No column noted that the away team raised their perfect rate from around twenty-five percent to over forty percent after adjusting the libero's position. Viewers only saw the away team play better, but no one could explain why. This is precisely the data gap I mean. It is not a harmless lack of information. It is the lack of metrics that could teach the next generation how to understand the match. A young coach learning the trade, if reading only the standard women's volleyball stat sheet, would never understand the importance of adjusting the libero's position. He would think defense is a matter of reflexes, not organization. Another metric almost entirely ignored in women's volleyball is the rotation index. Volleyball has six rotations, each fixing players' positions on court and therefore determining who may attack from the front row. Every team has at least one weak rotation, often called a two-attacker rotation, where only two front-row players are strong attacking options. Coping with these weak rotations is a core part of tactics, and overcoming them is a core part of a team's character. In men's volleyball, people routinely analyze how many points a team loses in its weak rotation. In women's volleyball, this metric is barely recorded. I once spent an entire season hand-recording the rotation index for one women's team I followed regularly. The result surprised me: this team lost nearly a third of their points in the three rotations identified as weakest. That meant almost their entire season outcome was decided by how they handled three rotations, not by general attacking skill. If I said this to an analyst used to reading only the standard sheet, they might think I was exaggerating. But the truth is that in volleyball, points are not distributed evenly across rotations, and understanding which rotation is weak is the key to understanding the match. A team that wins in three straight sets may have won only because their opponent fell into a weak rotation at the decisive moment. I remember a match where the total points of both teams were nearly equal, yet the winner won comfortably. The reason was that the winning team scheduled its serves and positioned its block to strike precisely at the opponent's three weak rotations. This is a high-level tactical game, a kind of chess that men's volleyball celebrates and women's volleyball is rarely credited with. Without a rotation index, people cannot see this tactical depth, and therefore they assume it does not exist. This is where I want to discuss the concept of out-of-system attack, one of the most important and most misunderstood concepts. An out-of-system attack is a situation where a team attacks after an imperfect first pass, so the setter cannot organize a tactical option and must set the ball in a passive position. In this situation, the attacker must rely entirely on individual ability to score against a well-organized block. Out-of-system attack is in fact an excellent metric for judging a team's character. A high out-of-system success rate shows the team has individuals who can produce points under disadvantageous conditions, an extremely valuable quality in volleyball. Conversely, a low rate shows the team depends too much on the system and will collapse when the system is broken. In women's volleyball, the out-of-system attack metric is almost never recorded. I believe this is a major shortcoming in evaluating women attackers. A hitter may have a mediocre overall success rate on the general stat sheet, but if analyzed separately in out-of-system situations, she may prove to be the only one who can score when the team is in chaos. This is exactly the kind of player every top team needs, yet the standard stat sheet does not see it. I once followed a women attacker through an entire season. On the official sheet, her attack success rate was only about forty percent, nothing outstanding. But when I hand-recorded and classified each attack by situation, I discovered that in out-of-system situations, her success rate rose to nearly fifty-five percent, well above the league average. In other words, she was the one who specialized in saving dead balls, a role the stat sheet has no place to recognize. When I shared this finding with a colleague, he asked whether it mattered in practice, since she still only scored forty percent overall. I answered that the meaning is this: if her team improved its reception system, her overall success rate would rise immediately, because she would be attacking under better conditions. What needed fixing was not her ability, but the system behind her. This is a conclusion only out-of-system analysis can produce. This finding made me revisit how I evaluate players overall. For years, I had unwittingly agreed with the standard stat sheets, believing they reflected the truth. But the deeper I dug, the more I saw they reflected the opposite: we record what is easy to record, and call it the truth. There is another aspect of women's volleyball I want to spend time analyzing: block organization. Blocking is one of the most complex coordination skills in volleyball. A successful block depends not only on each individual's height and jump but on timing, position, and coordination between two or three blockers. In women's volleyball, because average height is lower than in men's, teams must rely more on block organization to compensate for physical disparity. This means women's volleyball has a greater need for block data than men's volleyball. A women's team needs to know exactly where the opponent distributes attacks, which hitter likes the cross-court, which hitter favors the line, in order to organize blocking and defense effectively. But in most women's stat sheets, there is only total stuff blocks, and no analysis of the opponent's attack distribution. This is a colossal tactical waste. I remember a women's coach telling me she had to review video and hand-record the opponent's attack distribution over many nights, because no system provided this data for her league. She said she felt she was doing work that should have been supported by technology, but because it was women's volleyball she had no choice. This is a burden men's coaches rarely bear, because they have data at hand. This leads me to a larger question: is the data gap in women's volleyball the cause of women's teams developing less tactically, or merely a consequence of their receiving less investment? My answer is both, and they form a self-reinforcing spiral. Less data leads to worse analysis, worse analysis leads to less convincing results, less convincing results lead to less investment, and less investment leads to less data. Breaking this spiral cannot rely on goodwill alone. It needs a change in how we value women's volleyball. And in my view, that change begins by recognizing that women's volleyball is a sport with its own tactical depth, not a lighter version of men's volleyball. This is what I always try to emphasize in my writing. Women's volleyball is not men's volleyball with a slower tempo. It is a sport with a different tactical structure, where defensive organization, situational reading, and collective coordination play a larger role. When we impose men's volleyball metrics on women's volleyball, we do not just compare wrongly; we miss what gives this sport its unique value. Take serving tactics. In men's volleyball, power serving is the foremost weapon, and many matches are decided by direct aces. In women's volleyball, power serving still matters, but teams also place great emphasis on tactical serving, aiming at specific positions to break the opponent's reception system. Tactical serving demands high ball control and deep knowledge of the opponent, sometimes harder to execute than power serving. But in standard stat sheets, tactical serving is not recognized, because it does not produce direct points. I once watched a women's setter deliver fifteen consecutive serves aimed precisely at the opponent's weak position, completely collapsing their reception system. Her team won that set by a large margin, but on the stat sheet she was credited with only a few direct service points. Her real contribution lay in patiently hitting the same spot fifteen times, a tactical patience only those inside the game can see. When I told this story to a friend who does not follow volleyball, she asked why it mattered. I answered that it matters because it shows women's volleyball has tactical weapons men's volleyball rarely uses, and not recording them leaves viewers unable to understand how the sport actually operates. If you read only the stat sheet, you would think women's volleyball is a simpler game. But if you sit down and count, you find it is a complex game in its own way. This is where I want to address another aspect of women's volleyball: the role of the setter. The setter is the most important position in volleyball, the brain of the team. The setter decides who attacks, when, and with which option. In men's volleyball, top setters are usually evaluated by detailed metrics such as distribution efficiency and the success rate of the attacks they organize. In women's volleyball, setters are usually evaluated only by the points they score, a metric almost meaningless for this position. I remember a talented women's setter I once followed. She read the game extremely well, always knew how to deliver the ball to the right person at the right time, and could turn mediocre first balls into organized attacks. But whenever her team lost, she was the first blamed, because she did not score many points. None of her critics had data on how many quality rallies she had organized. They looked only at the point total, and concluded. This is a very common form of injustice in women's volleyball. The setter is the most misjudged position, because their real work is not measured. A good setter may score no points in an entire match yet still decide it. If we have no metric to see that, we will keep misjudging them and keep eroding their confidence in their own value. I believe adding metrics for setters is one of the most important changes that could improve women's volleyball. Once we measure a setter's true value, we will change how we train the position, how we pay them, and how we praise them. Young setters will no longer think they must score to be recognized. They will focus on developing organizational skill, a skill no one currently records. There is a very important psychological aspect to this. When a player does not see their value recognized in data, they tend to adjust their behavior to produce what is recognized. Setters begin trying to score more instead of focusing on organizing the ball. Liberos begin trying spectacular saves instead of standing in the right position. Pin hitters begin trying to hit through the block instead of executing more effective deception. All of this stems from a data system recording the wrong things. This is the deepest consequence of the data gap, and the reason I write this article. The problem is not only that we lack information. The problem is that we are teaching women players to play the wrong way, because we measure wrongly. I want to give a specific example of how this operates in practice. At a women's volleyball academy I once visited, young coaches taught students that points are the only measure of success. Students were encouraged to attack more, block more, score more. No one taught them the importance of passing to the right position, choosing the right attack option, reading the situation to organize the block. The result is that students develop into hitters who can score but do not understand the game. When I asked a student why she chose to hit the line instead of the cross, she answered that her coach told her to hit the line. When I asked whether she considered the opponent's block position, she looked blank. She had never been taught that an attack decision should be based on reading the situation. She was only taught that scoring is good. This is the result of a skewed data culture, where only the final outcome is recognized and the process is ignored. I do not blame the coaches. They work in a system where data is not provided to them. Without metrics, they have no basis to teach students about tactical depth. They teach what they were taught, and what they were taught comes from a system that abandoned women's volleyball long ago. This is where I want to speak of the responsibility of the media, including myself. We who work in sports media have contributed to this gap. When we report only on spectacular attacks, when we interview only the top scorers, when we use only the numbers the organizers provide, we are complicit in a deficient recording system. We have created a simpler version of women's volleyball and delivered it to viewers as if it were the truth. I remember once writing an analysis of a women's volleyball team's reception system, and the editor asked whether we needed to go so deep, since readers probably would not care. I insisted on keeping the article, and it received warm responses from women players and coaches. They thanked me for taking the time to see what they do. This showed me that the demand for deep understanding of women's volleyball exists; it has simply gone unmet. Media waves will pass. The children who see themselves in them will not. I believe that if we offer readers detailed analysis of women's volleyball, they will embrace it. We do not need to lower the standard to attract viewers. We need to raise the quality to match the true value of this sport. There is a question I often ask myself: is focusing on the data gap a way of evading the bigger issues of women's volleyball, such as pay inequality, lack of investment, and gender bias? I think not. I think the data gap is itself an expression of those bigger issues, and solving it is a concrete step toward solving them. When we fully measure the value of women's volleyball, we have evidence to demand fairer investment. When we show the tactical depth of women's volleyball, we break the stereotype that it is a simpler sport. I want to tell one last story, about a libero I once interviewed. She told me she had started recording her own matches, counting her own perfect passes, drawing her own positioning maps. She said she did this because no one else did it for her. She wanted proof that she had done well, that her work had value. She kept that notebook like a treasure, and whenever she felt lost, she opened it and read it again. This libero's story moved me deeply. It shows that when the system does not recognize you, you must recognize yourself. But this should not be the responsibility of the individual player. It should be the responsibility of an entire system, an industry, a society. No player should have to prove her own value with a handwritten notebook. I believe women's volleyball deserves a full data system, not because it will make the sport more like men's volleyball, but because it will let us see and treasure what makes it uniquely valuable. A good data system does not remove the beauty of the sport. It makes that beauty tangible, shareable, and transmissible to the next generation. When I look back on my journey in women's volleyball, from those early days holding a microphone with trembling hands to long analyses of reception systems, I see that everything I do revolves around a single question: how can the women who play this sport be seen as they truly are? This is a large question, and I do not have a complete answer. But I know part of the answer lies in data, in recording, in counting what has never been counted. There is one thing I have learned after many years in the trade: change does not come from grand declarations but from small actions repeated. Every time I stay after a match to count reception metrics, every time I write an analysis of rotations, every time I interview a libero about her quiet work, I am adding a brick to a larger structure. That structure is a culture that values women's volleyball for what it truly is. I do not know how long it will take to complete. Perhaps ten years, perhaps a generation. But I know it is being built, by people like the libero with her notebook, by coaches reviewing video at night, by young players daring to believe their value is not in the points they score. They do not need a savior. They only need to be heard, and to be counted. In volleyball, there is a concept called the second ball, the rally after a team has used its first attack option and must reorganize. This is the hardest rally, because it demands clarity and coordination under the least favorable conditions. I like to think of the effort to change women's volleyball as a second ball at a grand scale. We have tried many options, not fully succeeded, and now we must reorganize, under less than favorable conditions. But it is precisely in such conditions that our true character is revealed. When I left that small arena in Osaka that night, the blank stat sheet was still in my pocket. I kept it, not because it was useful, but because it reminded me there is much work to do. Someday, I hope to hold a complete stat sheet from a women's volleyball match, with full reception metrics, full rotation metrics, full detail on out-of-system attacks. On that day, I will know we have come a long way. Until then, I will keep staying after every match, counting, recording, telling the stories no one else tells. Because I believe women's volleyball does not need a savior. It needs people willing to sit down, listen, and count until the numbers become stories. And when the numbers become stories, the next generation will have something to learn from, to emulate, and to believe in. What I want to leave behind after this article is not a conclusion but an invitation. If you are a women's volleyball player wondering whether anyone sees your quiet work, I invite you to continue. What you do, even if unrecorded, is creating value. If you are a coach, an analyst, a journalist, I invite you to start counting what has never been counted. If you are a viewer, I invite you to listen more closely, look longer, to see that behind every point is a chain of decisions you may never have been told about. Women's volleyball is moving, one pass at a time, one season at a time. And its voice, however long neglected, is still waiting to be heard.