
Celebrating local produce with some very Japanese condiments.
Japanese fast food chain Mos Burger is famous for using locally sourced ingredients grown by local farmers, and ever since 2016, they’ve been supporting onion growers from Awaji Island with their “Awaji Island Onion Festival” campaign.
▼ Awaji Island (“Awajishima” in Japanese) is one of the country’s premier onion-producing regions
In celebration of the island onions, Mos Burger released a special burger called the Awajishima Onion Burger Tailored with Japanese-style Soy Sauce last year. It proved to be so popular with customers that the chain was inundated with requests to re-release the burger, and so the fast food chain is adding it to the menu again for a limited time this year.
With freshness in mind, the burger is only available for a limited time and will only be sold in the Kansai and Chu-Shikoku regions in and around Awaji Island.
▼ “Limited Time / Limited Regions”
Our reporter K. Masami is based in Osaka, which is located in the Kansai region, and so she was able to pick up one of the limited-edition burgers when they were released on 26 April.
As soon as Masami lifted the top bun on her burger, she was immediately impressed by the simplicity of what lay beneath. There were rings and rings of fresh onions, topped with a dollop of sauce and a serving of shaved bonito flakes.
It was hard to see beneath the massive mound of onion rings, so she turned the burger upside down and lifted the bottom bun to find a green lettuce leaf and a meat patty hiding underneath it all.
Masami had never seen so many onions in a burger before, and was worried they might destroy her taste buds with their spicy bite. However, after her first mouthful, she was pleased to find that the onions weren’t hot but actually sweet, due to the fact that they were freshly picked. Had they been dried onions like the ones you usually find at the supermarket, the flavour would’ve been far more intense, but as they were new onions, Masami was able to enjoy their pleasant savoury sweetness.
The subtle flavour of soy sauce and the smoky notes from the shaved bonito flakes complemented the onions perfectly, and even the meat patty took second place behind the onion rings, which clearly stole the show.
Masami gives this unusual burger a big thumbs-up, and says her only criticism is that it should be on the menu for longer and expanded nationwide so that more people around the country can fall in love with Awajishima’s onions.
Priced at 420 yen (US$3.85), or 450 yen with cheese, the burger will be available until mid-May.
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 releases new teriyaki burger-flavored snack fries with a slight identity crisis
Egg-teriyaki-cheeseburger-from-Mos-Burger-flavored potato snacks coming this month
Mos Burger adds new plant-based vegan teriyaki burger to its menu
French fry rationing continues in Japan as Mos Burger suspends sales (with two exceptions)
Mos Burger opens fancy burger shop and bar in Ginza, Tokyo
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
Live-action Spirited Away stage play announces world tour with first-ever U.S. and Canadian dates
Sleep at Hoshinoya Nara Prison, one of the most unique hotels in Japan
Tokyo has only two barley tea makers, and we visited one to see how mugicha is made
Japan’s Mocchurin donuts declared too popular to exist by creator Mister Donut, will disappear soon
Japan’s new pettably fuzzy cat-shaped earbud chargers meow to let you know their status[Video]
Studio Ghibli combines anime and craftsmanship in new Totoro and Jiji Gobelin tapestry bags
Studio Ghibli mini towels add anime flair to a Japanese cultural tradition
Why you shouldn’t feel guilty about using manga for studying and the top series for learning
Japanese overnight sightseeing train returns for summer with ramen stops and ocean views
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Family Mart Japan installs red-eyed “Monster Wolf” to keep bears away from convenience store
Starbucks Japan reopens Shinkansen platform store after redesigning it for speed
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Pikachu brings electric style to brand-new Pokémon G-Shock watch featuring every stater trio
Japanese man’s gross conveyor belt sushi social media prank video gets him a 500,000-yen fine
Starbucks Japan creates special drink bottle bags, adorable stickers for all 47 prefectures[Pics]
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Japanese sweets brand creates new drinkable Cigare and we’re totally here for it
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Mos Burger’s new “Focaccia Sand” surprises us with its long sausage
Japanese burger chain no longer serves onion rings, but offers intriguing replacement【Taste test】
The Onion Tower is Here! Mr. Sato Takes on 100 Slices of Grilled Onion in one Monster Burger
Mos Burger opens new online store dedicated just to frozen rice burger bulk buys
Crazy new Mos burger is covered in sauce, has a lineage that spans the globe
Mos Burger’s new super-thick sliced bread: Is it as good as their burgers? 【Taste Test】
Lotteria releases new deer burger in Hokkaido for a limited time
What’s the best way to spend 1,000 yen at Japan’s Mos Burger?【Japan Super Budget Dining】
Fried chicken sleeping bags to be awarded to 500 lucky Mos Burger customers
Burger King releases the King Yeti on Japan
Atsu Atsu Osatsu Balls and sweet potato shakes on the way for autumn dessert time at Mos Burger
Combining two of Burger King’s one-pound beef burgers for an extreme fast food challenge
New dinosaur fossil discovered on Awaji Island, named after Japanese god
Japan’s Top 7 alternative “Regional Burgers”
Burger King releases its first-ever “buns-free” burger in Japan