
We try all five flavors of the “Hyakunigiri” Kyoto steak restaurant collaborative product to see if they’ll really rice up our lives.
We’ve all been there–those nights when you forget to press the “on” button of the rice cooker and find yourself some time later with a growling stomach and nothing to eat, not in the mood for instant noodles, and also don’t have the energy to step outside. In precisely these kinds of situations, Hyakunigiri is the perfect solution.
These intriguing onigiri, or rice balls, the result of a collaboration between Kyoto-based restaurant Hyakushokuya and food company Ishii Shohin, first hit the market a few years ago. The lineup has slightly expanded since then to five flavors, all of which are high in protein and can last 100 (“hyaku”) days at room temperature despite being additive-free, making them excellent choices for an emergency food rations kit.
▼ Hyakushokuya (logo pictured below) is a famous steak rice bowl restaurant that only sells 100 meals per day at lunchtime. It’s certainly an interesting business model, but one that’s working well for them.
There are five types of Hyakunigiri:
● Steak flavor
● Curry flavor
● Chahan (Chinese-style fried rice) flavor
● Chicken burdock rice flavor
● Chicken rice flavor
You can purchase a sampling set of all five flavors, with two pouches of each, for 2,600 yen (US$18). Otherwise, sets of five of each individual flavor cost 1,250 yen, apart from the steak flavor, which costs 1,500 yen for five.
The reason that Hyakunigiri can last so long without preservatives boils down to a combination of clever vacuum sealing and a heat sterilization technique. In order to eat them, you just have to pop them in the microwave or heat the pouch in boiling water until the rice reaches your desired level of firmness (suggested heating times range from 30 to 70 seconds in the microwave or 8 to 15 minutes in boiling water).
We wanted to start our taste test with the steak flavor since it’s modeled after Hyakushokuya’s famous restaurant menu item. As soon as we ripped open the pouch, we were immediately enveloped by a charcoal-like aroma.
Its flavor also packed a strong punch, with plenty of beef and seasoning in the rice. It tasted even more like a beef bowl than we expected, and was super satisfying as a whole.
Next up was the curry-flavored rice ball. This one also released a fragrance as soon as we opened the pouch.
It was chock-full of flavor. If we had to compare it with something, it had the taste and texture of a dry curry, sans gravy. It was also fairly spicy to the point that small children would probably have a hard time eating it. We figured that a slice of melted cheese on top of it would elevate its impact even more.
Moving along, it was time for the chahan (Chinese-style fried rice) flavor.
This one had the strong taste of black pepper, which would likely polarize some diners. That worked in our favor, though, and we quite enjoyed it as a fried rice with a peppery punch.
We actually decided to re-wrap this one in the shape of a regular onigiri and bring it to a local park to finish later. It served us well as a quick bite on-the-go–and dare we say it, was even tastier when eaten outside.
The second-to-last flavor we tried was chicken burdock rice. This is one of two Hyakunigiri marketed as having a “gentler” flavor.
The bits of chicken and burdock throughout served as yummy accents within the rice. It had a comforting, quintessentially Japanese-style taste. True to its name, it wasn’t overly strong, but it seemed to get tastier the more bites we took. It was perhaps our personal winner of the bunch.
For the fifth and final chicken rice flavor, we decided to heat it up in boiling water over a gas stove as we would likely have to do during a real emergency when there wouldn’t be any electricity. This was the other Hyakunigiri said to have a gentler taste.
This method resulted in a better heat distribution and a softer overall texture. We were a bit bummed out, actually–we should have heated all of them up in this way!
Oh well. In terms of taste, it was solid, and we were tempted to add some egg to the mix to turn it into omuraisu.
The final verdict is that all of these Hyakunigiri are pretty amazing. Usually emergency food rations sacrifice flavor for functionality, but in this case, they were delicious enough to want to eat on the regular. We’ll definitely keep some on hand for those days when we just don’t want to cook–or, when we attempt some new culinary creation in the name of investigative journalism that falls a bit flat.
Reference: Ishii Shohin
All images © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]














Rice balls that can last for 100 days at room temperature? Kyoto company makes high-protein onigiri
Space Onigiri: Do these long-lasting Japanese rice balls taste any good on planet Earth?
We try out “instant rice balls”, prepared with water, to see if they’re actually tasty
Drinkable rice balls appear in Japan, allow you to chug the country’s favorite snack on the go
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
Downloads of 39-year-old Guns N’ Roses song increase 12,166 percent thanks to Gundam
A spotlight on Japanese singles figure skating: Jumping into the 2026 Olympics【Pt. II】
Japan’s first all-matcha ramen restaurant is now open in Kyoto【Photos】
McDonald’s Japan partners with anime English teacher, but did they commit a cultural error?[Video]
7 great places to see Mt. Fuji from without having to climb it
Sonic creator thanks fans for loving character so much that his ugly movie design will be changed
Nintendo’s controller capsule toys are so cool, even the machine you buy them from is awesome【Pics】
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Act of Japanese kindness touches one man’s heart, provides hope for elevator etiquette
Giant hotel rooms in Osaka reflect the new non-niche face of travel in Japan.
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
Three beautiful places to see Japan’s plum blossoms after starting your day in downtown Tokyo
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
Japan has a new bar just for people thinking about quitting their jobs, and the drinks are free
420 million yen in cash-filled suitcases stolen on Tokyo streets, incidents at Haneda and Hong Kong follow
Japan’s suicides fall to lowest recorded number ever, but one demographic hits all-time high
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
Japanese convenience store’s newest rice ball filling: Nothing at all, and why we’re OK with that
Rice balls, sushi and ramen: Japanese women share what they’d eat for their last meal
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Coffee-infused rice for rice balls and curry? Taste-testing a recipe from Japan’s coffee experts
Japanese convenience store packs a whole bento into an onigiri rice ball
Onikun: Epic onigiri so big they’re half demon, half rice ball
Pokémon Poké Ball rice balls now on sale in Japan, don’t taste like jelly donuts【Taste test】
We learn the dark secret of Japan’s Woodstock rice balls, still want to eat them【Taste test】
Convenience store onigiri rice balls become even more expensive…but are they worth it?
Who makes Japan’s best Spam-style onigiri convenience store rice ball? Let’s find out【Taste test】
Will frozen bento onigiri be Japan’s next big convenience store food trend?【Taste test】
Let’s eat some official Evangelion emergency rations!【Taste test】
7-Eleven Japan now has two tiers of salmon rice balls, but is the new, cheaper one any good?【Taste test】
In celebration of Onigiri Day, we compare rice balls from three different convenience stores
This Tokyo rice ball takes 20 years to make and 2,000 yen (US$14.30) to buy, but is it worth it?
Leave a Reply