Sumo wrestlers eat a protein-rich stew called chankonabe as the centerpiece of nearly every meal, alongside massive quantities of white rice. But the full picture is less about any single food and more about a carefully engineered system of timing, volume, and rest designed to pack on weight while fueling grueling daily training.
Chankonabe: The Signature Dish
Chankonabe is a hot pot stew loaded with chicken, tofu, and vegetables simmered in a savory broth. It’s the foundation of the sumo diet and has been for generations. The recipe is flexible by design. Some versions use pork or fish instead of chicken, and the vegetable mix changes with the seasons, but the core idea stays the same: a single pot that delivers protein, carbohydrates, and micronutrients in enormous servings.
The stew works so well for sumo purposes because it’s easy to prepare in bulk (junior wrestlers cook for the entire training stable), nutrient-dense enough to support recovery from intense training, and calorie-rich when paired with the sides that always accompany it. Those sides matter just as much as the stew itself.
What Surrounds the Stew
Chankonabe never arrives alone. A typical lunch includes five or six bowls of white rice per wrestler, with some eating closer to ten. There’s also miso soup, a main course of meat or fish, and side dishes of tofu or pickled vegetables. At dinner, rice portions are slightly smaller (roughly 300 to 450 grams of cooked rice) but still accompanied by a full spread of protein and sides.
Beer is a well-known part of the sumo lifestyle too. Wrestlers commonly drink beer with their meals, which adds significant liquid calories on top of already enormous portions. The combination of starchy carbohydrates, high-volume protein, and alcohol creates an exceptionally calorie-dense eating pattern.
Only Two Meals a Day
Perhaps the most surprising part of the sumo diet is that wrestlers eat only twice a day. There is no breakfast. The first meal comes around 11:00 a.m. after morning training, and the second meal is eaten in the evening, often just before bed. This pattern is intentional.
Skipping breakfast after hours of exertion pushes the body into a state of extreme hunger by midday, which makes it far easier to consume the massive portions required. Eating infrequently also appears to encourage fat storage. Research published in the American Journal of Clinical Nutrition found that the combination of high calorie intake and infrequent meals was a primary driver of obesity and elevated blood lipids in sumo wrestlers. When the body receives a huge caloric load in just two sittings rather than spread across the day, it’s more likely to store the excess as fat.
The Role of Training and Sleep
A sumo wrestler’s day starts around 6:00 a.m. with keiko, the morning training session. This is five hours of intense work on a completely empty stomach: stretching, bodyweight exercises, and sparring bouts. Training on an empty stomach lowers the metabolic rate over time because the body adapts to conserving fuel during exertion. That metabolic adjustment makes it easier to gain and maintain weight even when training is physically demanding.
After the midday meal, wrestlers take a mandatory nap. Sleeping immediately after consuming thousands of calories minimizes the energy burned during digestion and encourages the body to store more of that food as body mass. The nap isn’t laziness. It’s a deliberate weight-gain strategy, and it’s been part of sumo training culture for centuries. The entire daily cycle of fasted training, massive meal, sleep, second massive meal, and sleep again is an engineered system for building size.
How Many Calories Wrestlers Consume
Professional sumo wrestlers consume up to 10,000 calories a day, roughly four times the intake of an average man. That number sounds staggering, but it adds up quickly when you consider the rice volume alone. Ten bowls of white rice at lunch could easily reach 2,000 to 3,000 calories before counting the stew, the protein sides, or the beer. Multiply that across two massive meals and the total climbs fast.
Not every wrestler eats 10,000 calories daily. That figure represents the upper range. Lower-ranked or lighter wrestlers may eat somewhat less, but even the smaller wrestlers in professional sumo are consuming far more than what any standard dietary guideline would recommend. The caloric surplus is non-negotiable for competing at the sport’s highest levels, where body mass is a direct competitive advantage.
Health Consequences of the Sumo Diet
The sumo diet is remarkably effective at building size, but it comes with serious long-term costs. Active wrestlers experience higher rates of diabetes, gout, high blood pressure, and elevated blood lipids. While they’re competing, the intense daily training provides some protective effect, keeping them more metabolically healthy than their weight alone would predict.
Retirement is where the real danger begins. When wrestlers stop training but struggle to change lifelong eating habits, the health consequences accelerate. Many retired wrestlers face chronic illness, and life expectancy for former sumo professionals is significantly shorter than for the average Japanese person, who otherwise enjoys one of the longest lifespans in the world. The diet that builds a champion’s body during competition often becomes a serious liability once the training stops.