
Beef bowls are cheap, tasty and filling, so does that mean they have to be bad for you?
Yoshinoya is the biggest purveyor of one of Japan’s favorite convenient meals: the beef bowl, or gyudon, as it’s called in Japanese. With Yoshinoya locations covering the country, open from early in the morning until late at night, the chain boasts a loyal legion of repeat customers. As a matter of fact, if there’s a branch near their campus or workplace, some people may eat Yoshinoya’s beef bowls on a near-daily basis.
But does a steady stream of gyudon have any adverse effects on the body? To find out, Yoshinoya announced last fall that it would be launching a three-month study on a beef-bowl intensive diet, in cooperation with Kyoto’s Doshisha University. A total of 24 participants, both men and women, were selected for the experiment.
In addition to functioning as a restaurant, Yoshinoya also sells frozen packs of its gyudon toppings: stewed beef and onions. Each participant was instructed to eat one pack a day, while otherwise continuing with their preexisting lifestyle. They were requested to make no changes in their exercise or otherwise alter their eating habits.
The three-month period ended in early December, and the results have just been announced: Researchers found no significant changes in the weight, body fat percentage, or blood pressure of the participants, nor in their blood-sugar, cholesterol, or triglyceride levels, compared to data taken before starting the daily gyudon diet.
The results might seem surprising, but the presence of the onions means that gyudon isn’t an entirely meaty entrée, and the dish is completely free of deep-fried elements. It’s also important to note that the standard serving size of a Yoshonoya gyudon pack is a modest 135 grams (4.8 ounces), so again, the study’s results shouldn’t be taken as a green light to let your carnivorous cravings run wild. Still, it suggests that if you’re in need of a quick meal, you could do worse than a Yoshinoya beef bowl.
Source: Nikkei via Hachima Kiko
Top image ©SoraNews24

Yoshinoya studying what happens to the body after three months of eating beef bowls
Mix-and-matching Yoshinoya, Matsuya, and Sukiya to create the ultimate beef bowl【Taste test】
Make Your Own Yoshinoya Beef Bowl at Home, Even Better Than the Original 【Recipe】
One Japanese man has eaten at the same beef bowl restaurant for over 1,800 days in a row
From beef bowl to beef pouch? Taste testing Yoshinoya’s instant gyudon packs
Harajuku’s new permanent Tamagotchi shop is filled with cuteness and a surprising lack of poop
Hayao Miyazaki says Happy New Year to Studio Ghibli fans with new art for Year of the Horse
We found possibly the quietest Japanese-style hotel in Tokyo’s bustling Shinjuku district
The best Starbucks Japan Frappuccinos we want to drink again in 2026
Beautiful, intricate drawings of snowflakes from Edo-era Japan
Is this the most relaxing Starbucks in Japan?
Sailor Moon Sanrio partnership adds pairings for Sailor Starlights in new crossover merch line【Pics】
Japanese beauty trends of the 20th & 21st centuries, and predicting future fashions
Professional manga artist creates stunning pop-up style artwork with just pencil & paper
Need work? Two of Japan’s biggest manga magazines hiring one-day editors, no experience necessary
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
7-Eleven Japan’s ramen-cooking robot whipped us up a bowl of noodles【Taste test】
Cyberpunk anime meets traditional culture in Ghost in the Shell gold leaf Japanese changing screens
7 great places to see Mt. Fuji from without having to climb it
Hello Kitty Choco Egg figures are an adorable trip through three periods of Japanese pop culture【Pics】
Japan’s otoshidama tradition of giving kids money at New Year’s gets a social welfare upgrade
Lacquerware supplier to emperor of Japan and Pokémon team up for new tableware
Sumo Sanrio! Hello Kitty and pals team up with Japan Sumo Association for new merch【Pics】
Can a dirty butthole make you filthy rich in Japan? We’re starting a New Year’s lottery experiment
7-Eleven Japan starts new temporary luggage storage service in over 300 branches
Disillusionment at Tsukiji’s tourist-target prices led us to a great ramen restaurant in Tokyo
Starbucks teams up with 166-year-old Kyoto doll maker for Year of the Horse decorations【Photos】
Tokyo considering law requiring more trash cans following litter increase in heavily touristed area
Tokyo’s Tsukiji sushi neighborhood asks tour groups to stay away for the rest of the month
Nintendo’s Kirby now delivering orders at Kura Sushi restaurants, but not in Japan
Tokyo event lets you travel back in time, for free, to celebrate 100 years since Showa era start
Sanrio theme park in Japan announces plans to expand into a Sanrio resort
Japan may add Japanese language proficiency, lifestyle classes to permanent foreign resident requirements
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Japan’s deadliest food claims more victims, but why do people keep eating it for New Year’s?
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
New fried take on Yoshinoya’s original beef bowl really hits the spot! 【Recipe】
Yoshinoya’s special Japanese parliament-only wagyu beef bowl is now available to us civilians too
The best way to eat a gyudon beef bowl, according to staff at Yoshinoya
Yoshinoya sells frozen beef bowl topping packs, but are they as good as the restaurant kind?
Japanese Black Wagyu from Yoshinoya – Premium beef isn’t just for politicians anymore!【Taste test】
Pharmacies in Japan now sell Yoshinoya beef bowls
Secret way Yoshinoya’s president customizes his beef bowl orders is a secret no more【Taste test】
Japan’s beef bowl king, Yoshinoya, releases new line of canned, ready-to-eat beef bowls
Yoshinoya, Japan’s biggest beef bowl chain, is now serving fried chicken in Tokyo
Yoshinoya’s Pokémon beef and curry bowls return and bring Pikachu along for the fun【Photos】
Tsukimi Moon-Viewing season begins in Japan with new Yoshinoya gyudon beef bowls
Yoshinoya beef bowls become miniature gacha toys
Yoshinoya has a semi-secret chicken bowl you won’t find anywhere on its website【Taste test】
Japanese beef bowl chain Yoshinoya releases new canned, ready-to-eat rice bowls 【Taste Test】
Hello Kitty and Badtz-maru grace high-class Arita-yaki ceramic Yoshinoya bowl that could be yours
Leave a Reply