
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’s new “Focaccia Sand” surprises us with its long sausage
30 Pikachus want to share a Tokyo hotel room with you that has separate Grass, Water, Fire spaces
Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
Howl’s Moving Castle’s scene-stealing dog is here to clean your home as a plushie mop
Lawson convenience store at popular tourist site is one of the most unusual in Japan
Studio Ghibli celebrates the magic of movie theaters with short video, Hayao Miyazaki illustration
Never been into a girl’s room before? Then this reference photo book is for you
It’s naked time: An American’s first onsen experience 【Video】
Intimate Korean yoga workout promises to burn calories, get your heart racing【Video】
Pringles Chocolate, but with a Japanese twist, is the snack hack you should be trying right now
A man-made cave of wonders: the world’s biggest underground storm drain in Kasukabe, Japan
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Starbucks Japan closing only Shinkansen platform branch for popularity-triggered renovations
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
Two food hacks take Japan’s convenience store fried chicken to amazing new sandwich heights
7-Eleven Japan’s new baked-in-store sweet treat is only available in three parts of the country
Man bites woman at cherry blossom park in Japan, dies shortly after
Peanuts and Coke becomes a viral hit in Japan, but is it a trend worth joining?
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
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
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
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
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
Get a taste of paradise at Japan’s top 8 ocean view cafes