
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】
East Japan Railway announces plans to abolish magnetic-strip tickets
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
Shakey’s Japan creates matcha mochi, Kyoto fish, and Kansai Chili Con Carne pizzas
Anne Hathaway creates PR frenzy in Japan after mentioning Tottori in Devil Wears Prada interview
7-Eleven Japan reinvents convenience store fruit sandwiches with new salty pink sakura peach variety
Trigun Legacy Cafe coming to two Japanese cities this summer to salute series’ original form
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
Starbucks adds new Fruit Gummy sweets to stores in Japan
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
7-Eleven Japan releases a chocolate chip sandwich… that tastes like ice cream
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Japanese convenience store shows us how to dress for the rainy season
Ghibli’s No Face continues to demonstrate his generous character growth by dispensing soy sauce
Japanese rice cooker recipe gives us a tasty new way to enjoy vegetables and wieners
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
Tokyo’s Pokémon Cafe reopens this month with brand-new sweets and Pikachu show
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Colour Hunting: The hot new street photography trend changing how we see Japan
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
Kanji ice cream becomes a sell-out hit in Japan
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Japanese convenience store Lawson launches new “mini supermarket” chain, L Minimart
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
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]
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】
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]
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Japanese convenience store’s newest rice ball filling: Nothing at all, and why we’re OK with that
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Rice balls, sushi and ramen: Japanese women share what they’d eat for their last meal
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】
Japanese convenience store brings rice balls back to 100 yen – Is this deal worth it?[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
Seven new rice ball flavors, including some Nissin collabs, coming to Family Mart this spring