
Our search in natto mecca Mito leads us to Kogoira Natto.
Just about every part of Japan has a food it’s famous for, and in Mito, the capital city of Ibaraki Prefecture, that food is natto, a.k.a. fermented soybeans, a.k.a. Japan’s smelliest food. But if Mito is the best place for natto, then by extension the best natto in Mito should be the very best in all of Japan, right?
That was the logic our Japanese-language reporter Ikuna Kamezawa was following when she asked her friend, a Mito resident, to recommend the best natto you can buy in the city.
Ikuna popped this question while she and her friend were at a Mito supermarket, standing in front of the giant natto shelf. Even with that wide selection, though, Ikuna’s friend said the best natto wasn’t here, so the two of them headed to the Mito branch of the Keisei Department Store…
…and over to the kensanhin (県産品), or Ibaraki-produced items, area on the store’s food floor, where Ikuna’s friend pointed her to the Kogoira Natto from maker Marushin Shokuhin.
This, her friend said, is the best of the best…but Ikuna had never heard the word “kogoira” before. It turns out that it’s a variant of soboro natto, which is itself a variant of regular natto. In soboro natto, the fermented soybeans are mixed with minced daikon radish, and if you throw in the radish’s leaves too, then it becomes Kogoira Natto.
▼ Kogoira Natto
▼ Regular natto (left) and Kogoira Natto
Despite Ikuna’s friend’s glowing endorsement, Kogoira Natto is priced at just 324 yen (US$2.30), and Ikuna decided to pick up three different types of it.
▼ Clockwise from top left: Kimchi Kogoira Natto, Plum Sea Grass Kogoira Natto, and regular Kogoira Natto
▼ The different flavors come from included sauces that you stir into the fermented soybeans right before eating.
Natto is sold refrigerated, so Ikuna asked for plenty of ice packs for her trip back to Tokyo to share her natto bounty with the rest of the SoraNews24 HQ staff.
She decided to start the sampling by giving fellow writer P.K. Sanjun a taste. However, P.K., who has a deep hatred of natto thanks in no small part to its extremely pungent, sock-like odor, turned her away immediately.
▼ Yes, even among people born and raised in Japan, natto’s smell can be a deal breaker.
Next, she approached Japanese editor Go Hatori, who has no olfactory hangups when it comes to natto.
So what did Go, who’s a natto fan in general, think?
“Hey, this is good stuff! It’s…interesting. Oh, is this daikon radish? That’s unique! Even more than a deliciously interesting natto, I’d call this an interestingly delicious natto!”
Also down for a taste was Jun, another member of our Japanese-language writing staff and a natto lover, who said of the Kogoira Natto “This is the best-tasting natto I’ve ever eaten.”
So while people who can’t handle the smell of natto probably won’t be able to come near enough to Kogoira Natto to taste it for themselves, if you’re someone who doesn’t mind natto’s aroma, you’ll probably love the taste of this natto, and if you can’t make the trip to Mito, it’s available online from Marushin Shokuhin here.
Related: Keisei Department Store (Mito branch)
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 ]












We spice up our fermented soybeans with curry powder flavored natto【Taste Test】
Pork Cutlets with Fermented Soybeans? All-You-Can-Eat Natto Part 2!
Could this be the secret to get Americans to actually like natto (Japanese fermented soy beans)?
Natto for beginners? How to half-make Japanese fermented soybeans at home【SoraKitchen】
We head out to Kyoto to eat a delicious crepe crammed with fermented soybeans, rice【Taste Test】
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Three beautiful places to see Japan’s plum blossoms after starting your day in downtown Tokyo
Save the Nakagin Capsule Tower Project is now aiming to preserve as many capsules as possible
How much do fans of boys’ love spend every year on homoerotic comics? The amount may surprise you
Mr. Sato attempts to battle his butt forest with Japan’s affordable Osu! Ass Hair Trimmer
The meaning of the mandarin and 6 other Japanese New Year traditions explained
Wazigen Shizukaya’s latest collection of modern men’s kimono make a move for high fashion
Denny’s new Japanese parfait looks totally different depending on what angle you look at it from
Japan has a new bar just for people thinking about quitting their jobs, and the drinks are free
Naruto jerseys coming to Major Leage Baseball theme nights, Hello Kitty to take over a field
Yokai are descending upon Tokyo this spring in the latest immersive art experience
New Studio Ghibli stamps leave an impression on your stationery…and your heart
Cherry blossom forecasts map shows Japan’s OTHER sakura season is starting right now
Japan cherry blossom forecast update moves up sakura dates for many parts of the country
Morning-after pill finally available in Japan without a prescription, must be taken at pharmacy
Japanese women sound off on their minimum height requirements for a husband【Survey】
Japanese man gets drunk and falls asleep on Tokyo streets, then gets robbed by foreign national
And now, we eat a bear paw we bought in Japan’s Chiba Prefecture【Taste test】
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Japan releases first official sakura cherry blossom forecast for 2026
10 times to avoid traveling in Japan in 2026
Archfiend Hello Kitty appears as Sanrio launches new team-up with Yu-Gi-Oh【Pics】
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
China’s don’t-go-to-Japan warning looks to be affecting tourist crowds on Miyajima
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Studio Ghibli releases new “komorebi” plush toys from Princess Mononoke and Spirited Away
Ramen restaurant’s English menu prices are nearly double its Japanese ones, denies discriminating
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
The surprising reason natto (fermented soybeans) are hard to swallow for many Japanese surfers
All-You-Can-Eat Fermented Soybeans for $8.50! Choose From Eight Types of Natto!
Our resident natto lover tries Mythical Natto from Hokkaido and gets spirited away【Taste test】
The most expensive natto in Japan – Eating the “black diamonds” of Tanba Kuro【Taste test】
How many times should you mix natto to make it more delicious?
Nattoku! Factory offers free factory tours of a famous natto brand production process
Japan’s first made-to-order natto store will make you fermented beans without the putrid smell
Our natto maniac verifies the legitimacy of fermented soybean-flavored potato chips【Taste test】
There’s no reason not to play with your food with this natto in Nanoblock form
We try ice cream with a topping of natto fermented soybeans, because the Internet told us to
We try a new natto coffee ice cream that took 17 months to perfect
Gross out your natto-hating friends with this incredibly realistic, sticky-looking train pass case
Natto-infused ramen is a thing — we tried it, we love it【Taste test】
Instant natto soba a suspiciously hot item so we check it out
Japanese bento serves up a slice of the samurai life in a special carry case
Leave a Reply