
A thorough comparison experiment, except we had no control group whatsoever.
MOS Burger, MOS an acronym for “mountain, ocean, sun,” is a popular burger chain in Japan, serving up a variety of fare. In addition to standard hamburgers, some of their most popular products are rice-bun burgers, which replace the bread with two discs of lightly grilled rice for you to wrap your hand around.
One of our Japanese-language reporters, Kg, though, fancifully wondered if there were other ways to eat a MOS rice burger. That was when a wicked idea crossed their mind: MOS rice burgers and ochazuke.
Ochazuke, considered a comfort food as well as a great finale to any meal, consists of two basic ingredients: green tea and rice. While you can pair your ochazuke with pickled plum or salmon for a heartier dish, Kg firmed his resolve to see whether or not the combo of a MOS rice burger and green tea would do the trick.
Kg first went out to buy the rice rice burgers, and picked out five in total. There was the limited edition shrimp tempura pollock roe burger and the even larger “Deep-Fried Greed” pollock roe burger. Of course, Kg also made sure to pick up classic rice burgers from the regular menu: the shrimp tempura burger, the seafood deep-fried veggies burger, and the yakiniku burger. You can see a photo of the burgers below, respectively starting from the top left corner.
▼ Pro tip: the shrimp tempura burger (upper right hand corner) is a secret menu item.
After buying the burgers, Kg began to prep for the experiment. He placed each burger in its own bowl while steeping tea.
Keeping track of which bowl had which burger, Kg then began to pour the tea. For each bowl, he poured just enough tea to cover half the burger. While the golden ratio of green tea to rice is debatable for ochazuke, similar to how many argue about how much milk one should pour in a bowl of cereal, Kg figured up to half a burger was a fair balance.
After adding tea to every bowl, Kg then proceeded to mash up the burgers and mix them thoroughly with the tea. The outcome was not exactly eye-pleasing, but Kg had to admit the scent of green tea, rice, and tempura wasn’t necessarily terrible either.
Gripping his spoon and bolstering his willpower, Kg took his first bite… and surprisingly, the taste wasn’t disastrous. It was more refreshing than he expected, as the light bitterness of the green tea balanced out with the savory tones of the burgers, and before Kg knew it, he was quickening the pace of his taste test. The tastiest burger in his opinion was…
…the shrimp tempura burger!
The chewiness of the tempura in contrast with the harder rice grains provided a nice texture, and Kg felt that the green tea allowed the salty-sweet flavors of the shrimp to seep out more. Admittedly, the same could be said for the other deep-fried burger dishes, but what helped the shrimp tempura burger prevail in the end was its stronger flavor.
Naturally, if there was to be a best-tasting burger-ochazuke combo, there must also be a worst-tasting burger-ochazuke combo. The burger which unfortunately won that title was…
…the yakiniku burger!
Frankly, the yakiniku burger doesn’t look THAT bad to the eye but once Kg tried the first bite, he was sent reeling by the dissonance in flavor. Not only was the meat’s taste overpowering, but the sweetness of the yakiniku sauce combined with the bitterness of the green tea did nothing but confuse his palate. To be slightly fair, that wasn’t to say all the other burgers combined perfectly with the green tea, but he had to give it to the yakiniku burger for its taste-bud-destroying power.
▼ Note: Keep the yakiniku rice burger as part of the control group for next time.
In the end, when it comes to eating anything in general, Kg concluded that the best way is to simply eat things in the manner you most enjoy or find the most delicious. Perfect, wholesome advice especially for these chaotic, strange times where everyone deserves a break and their favorite foods.
Photos © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]








Mos Burger opens new online store dedicated just to frozen rice burger bulk buys
Mos Burger fries up an unusual fusion with Tempura Rice Bowl Burgers
Lotteria unveils its first rice burgers, but how do they compare to Mos Burger and McDonald’s?
Mos Burger x Dassai sweet sake collaboration expands with new rice burgers and a konjac drink
Rare Mos Burger vending machine sells items not found in restaurants
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Japan’s kid-friendly ski program is now selling Pikachu snowboards for a limited time only
Mister Donut and Godiva continue their sweet sweets relationship with new treats on sale now in Japan
Immersive ukiyoe exhibition in Osaka adds some scented flair
Japan’s foreign tourist numbers projected to fall for first time in years in 2026
Starbucks celebrates Halloween with new Frappuccino, tea and drinkware in Japan
We try an unusual buffet of dishes made from wild game at a roadside stop in Chiba
What’s inside Starbucks Japan’s fukubukuro lucky bag for 2026?
Semi-secret fried chicken from Japan’s big-three beef bowl chain Sukiya is worth tracking down
New anime train and bus ready to receive the love of Love Live! Sunshine!! fans in Shizuoka
10 times to avoid traveling in Japan in 2026
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
Ramen restaurant’s English menu prices are nearly double its Japanese ones, denies discriminating
Princess Mononoke magnets return just in time to treat yourself to awesome anime decorations
Umamusume anime girl plushie recalled for having parts she absolutely should not have【Pics】
Giant hotel rooms in Osaka reflect the new non-niche face of travel in Japan.
Japanese women showing rebounding interest in giving Valentine’s Day chocolate【Survey】
We ate sushi made from Japan’s most expensive tuna ever【Taste test】
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
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’s Tsukiji sushi neighborhood asks tour groups to stay away for the rest of the month
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
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
Mos Burger Goes Green With Their Mos Natsumi Burgers
Using Starbucks Japan’s hot water to make ochazuke, one of Japan’s best comfort foods
Mos Burger’s new super-thick sliced bread: Is it as good as their burgers? 【Taste Test】
Make potato chips twice as delicious by soaking them in green tea before eating them【SoraKitchen】
Mos Burger’s sauce-soaked Wet Burger sure is wet, but is it worth your burger bucks? 【Taste test】
Mos Burger’s new Ebi Ebi Fry Burger is on a whole other level
Mos Burger’s new Mac and Cheese burger: Does it taste as good as it looks?
Japan’s MOS Burger replaces hamburger buns with lettuce for limited “Natsumi” range
Mos Burger brings back its hugely popular “White Mos Burger”, but is it any good?
We try a curry milkshake at Mos Burger Japan 【Taste Test】
Katsu curry rice you can eat with your hands? Mos Burger unveils new Rice Burger Katsu Curry
Holy mackerel! Two new seasonal rice burgers for Japanese food fans
Mos Burger vs Burger King: Which chip butty is better?
Is Lotteria’s new meat sauce burger a challenge to the reign of Mos Burger’s Japanese classic?
Japan’s Mos Burger Dassai sake milkshake is here, but is it any good?【Taste test】
A tale of two tonkatsu burgers – We pit McDonald’s pork cutlet sandwich against Mos Burger’s
Leave a Reply