
We put the JAXA-endorsed product to the test.
When you’re miles away from home and looking for something to perk your energy and lift your spirits, you can’t go past a favourite childhood meal to give you the boost you need.
That’s the theory behind Japan’s Space Onigiri, developed by Onishi Foods and the Japan Aerospace Exploration Agency (JAXA) as a meal for long-term stays on the International Space Station (ISS).
Luckily for us, these space-bound rice balls are also sold on Earth, so when our cosmos-loving reporter Masanuki Sunakoma came across one at a store inside Tokyo Station recently, he immediately purchased it and took it home for a taste test.
▼ The product contains “Alpha Rice” that doesn’t require cooking.
Following the simple four-step preparation process illustrated on the back of the bag, Masanuki first removed the small oxygen-absorbing pack…
…And then filled the bag with water, up to the dotted line, essentially hydrating the rice inside. While cold or boiling water can be used for this step, Masanuki chose to add cold water.
Then it was time to shake. Masanuki resealed the top of the bag and shook the whole thing around 20 times. Once this was done, all that was left to do was wait, and seeing as Masanuki chose to use cold water instead of boiling water, the rice ball would be ready to eat in 60 minutes instead of 15.
▼ Once an hour had passed, Masanuki opened the top of the bag and peered inside.
The rice looked plump and ready, so now it was time to cut the bag along the dotted line to bring out its triangular shape and make it easy to hold and eat.
Masanuki loved this clever design, which kept his hands clean, especially when he flipped the plastic down to reveal the beautifully shaped rice ball and its salmon-flecked surface.
As he ate, he felt he was tasting the universe, and though the taste wasn’t as great as a freshly made onigiri, the rice was much softer and lighter than he’d expected.
▼ Light meals like this come in handy when you don’t want to be weighed down in space.
The Space Onigiri can be stored for a year without refrigeration, making it a good option for earthlings wanting to add long-life emergency rations to their disaster preparedness kits.
▼ Just remember to add a bottle of water to your kit as well!
Priced at 378 yen (US$3.49) each, these rice balls are a fun way to live an astronaut’s life on Earth, and if you combine them with Nissin’s space ramen and space curry rice, you’ll have a complete meal that’s truly out of this world.
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 ]
onigiri rice ball










Want onigiri? Just add water to Onisi Foods’ new rice balls!
Do we say yay or nay to the additive-free rice balls that can last 100 days at room temperature?
Cup Noodle’s Nissin develops space ramen, space curry rice for astronauts to eat among the stars
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Traditional Japanese cuisine gets an out of this world treatment — we try Japanese Space Food
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Lawson transforms convenience store food with massive katsu burger and an insane curry bread
Starbucks Japan releases special limited-edition summer drinks… at only 30 stores
Two of Kyoto’s famous temples tackle streetside trash with solar-powered trash cans
Anne Hathaway creates PR frenzy in Japan after mentioning Tottori in Devil Wears Prada interview
East Japan Railway announces plans to abolish magnetic-strip tickets
Luxury houseplant fraud leads to arrest of Takamatsu man
Super Mario Galaxy Happy Meal toys now available at McDonald’s Japan
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
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
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
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
Body of missing American college student found in Kyoto mountains
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]
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
Japanese convenience store shows us how to dress for the rainy season
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
Onikun: Epic onigiri so big they’re half demon, half rice ball
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
In celebration of Onigiri Day, we compare rice balls from three different convenience stores
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
The 10 best types of onigiri rice balls to try in Japan【Survey】
Rice balls that can last for 100 days at room temperature? Kyoto company makes high-protein onigiri
Tapioca onigiri brings boba to the world of rice balls
What’s it like to eat an enormous panda onigiri rice ball that weighs over two pounds?
7-Eleven Japan now has two tiers of salmon rice balls, but is the new, cheaper one any good?【Taste test】
The difference between onigiri rice balls in Tokyo and Osaka
The polite way to eat onigiri rice balls sparks debate online
How good is this popular wooden onigiri mould, made by a Japanese rice specialist?
Japanese convenience store releases a new bento sandwich, but is it better than a bento rice ball?
Beyond rice balls: How to make an edible onigiri rice cat【Video】
Japanese convenience store packs a whole bento into an onigiri rice ball
Onigiri in Paris: Small lunch shop brings traditional Japanese rice balls to France