
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 ]








Japan’s Mos Burger creates tempura rice bowl bento boxed lunch burger, but not for its menu
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
Foreign man arrested for walking on Shinkansen tracks, claims he was on the run from yakuza
New 7-Eleven sandwich goes viral in Japan, but is it everything it’s cracked up to be?
Family Mart unveils new Japanese bread that elevates convenience store food to mocchiri levels
Tokyo turns its phone booths into free Wi-Fi hotspots, and here’s how to use them
Schoolkids learn life skills through shopping field trips at street markets in Kochi Prefecture
New sakura cherry blossom viewing sheets bring old-school beauty to hanami picnics
Häagen-Dazs releases new Green Tea sandwich in Japan for a limited time
Boro the Caterpillar anime now showing at the Ghibli Museum in Tokyo 【SoraReview】
KFC Japan releases special finger sheaths for hassle-free fried chicken eating
Japanese Penis Festival shrine distances itself from penis mascot
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Starbucks Japan closing only Shinkansen platform branch for popularity-triggered renovations
Two food hacks take Japan’s convenience store fried chicken to amazing new sandwich heights
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
Fading Tokyo – Searching for signs of the Showa era as local neighborhoods evolve[Photos]
Pokémon lacquerware series expands for Year of the Horse with new handcrafted design[Video]
Tokyo teahouse serves up a sakura matcha dessert you won’t find anywhere else
Totoro Fund line of beautiful artwork and apparel lets you help the real-world Totoro Forest
Japan now has a special desk for people who work at home with a pet cat[Photos]
Famous Tokyo cherry blossom spot installs view-blocking screens to fight overcrowding[Video]
Uniqlo announces new T-shirts for One Piece, Naruto and more for manga publisher’s 100th birthday
Train station platform ramen store closes its doors on half a century of history in Tokyo
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
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
Starbucks Japan releases new drinkware and goods for Valentine’s Day
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
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
Rare Mos Burger vending machine sells items not found in restaurants
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?
A tale of two tonkatsu burgers – We pit McDonald’s pork cutlet sandwich against Mos Burger’s
Mos Burger’s new “Tobikiri Avocado Croquette Burger” teaches us how great potatoes are