
People in Japan are going crazy for boba ball rice balls.
Ever since the tapioca milk tea craze hit Japan, the thirst for boba balls has grown to include weird and wonderful creations like tapioca beer, bubble tea ramen and boba ice cream bars.
Now it’s time to try boba onigiri rice balls, which are currently being sold exclusively at Japan’s Aeon retail chain. They’ve been causing such a stir online with fans that we were keen to try them for ourselves, so we headed out to Aeon to get our hands on one of the onigiri, taking it back to the office for a taste test.
What makes the rice balls even more interesting is the fact that they’re actually soy-sauce pickled tapioca onigiri. Written on the label is “Showa vs. Heisei/Reiwa Onigiri Championship“, suggesting that these new rice balls symbolise the direction we’re heading in now as we leave the traditions of the Showa (1926-1989) and Heisei era (1989-2019) and enter the new Reiwa era from May this year.
Looking at the ingredients, we could see that each rice ball consisted of locally grown rice, soy sauce pickled tapioca, seaweed, and salt.
Unwrapping the package revealed a seaweed-wrapped rice ball that looked no different to any other we’ve seen before.
▼ Splitting it in two, however, revealed its very unusual filling.
Turning up the light to really see its contents, we could see a cluster of bright, shiny boba balls glistening with an orange hue from the soy sauce pickling. While the balls looked small, they packed a punch when we ate them, delivering tasty bursts of salty soy with every mouthful.
The colour and texture of the filling actually tricked us into thinking we were eating salmon roe with soy sauce, making it an even more unusual experience. And once we’d finished it, we could’ve easily downed another, so if you’re going to head out to try one of these, we highly recommend buying two so you’re not left wishing for more boba after getting a taste of it.
Or you can do what we did earlier, by making tapioca milk tea rice in the rice cooker.
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 ]






Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Convenience store onigiri rice balls become even more expensive…but are they worth it?
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
Onikun: Epic onigiri so big they’re half demon, half rice ball
Are Family Mart’s new “exquisite” rice balls worth the high price tag?
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
7-Eleven Japan to start selling Vietnamese banh mi sandwiches this summer
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Studio Ghibli adds new My Neighbour Totoro music box to its anime merchandise store in Japan
Starbucks Japan releases new Frappuccino, tea and soda drinks for summer
Gama Land, the weird Japanese amusement park celebrating toads, is now like a ghost town
Starbucks Japan releases new limited-edition summer drinks…and a pastry for dunking
All-you-can-eat cheese restaurant in Tokyo is a hidden gem not many people know about
Lawson Japan releases a crazy new product to remind us it’s not just famous for convenience store food
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Universal Studios Japan is giving Frieren anime fans the chance to make unforgettable memories.
Tokyo’s life-size Gundam is getting a new look before its end-of-summer removal
Japanese bento shop touches hearts by selling super cheap boxed lunches for around a dollar
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Lawson upsizes convenience store food for a limited time with two must-try Japanese meals
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
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
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]
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
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
The 10 best types of onigiri rice balls to try in Japan【Survey】
We ate a pickled tapioca bubble rice bowl and it was un-bowl-lievable
Former sushi chef serves onigiri rice balls for breakfast at new morning restaurant in Japan
Onigiri in Paris: Small lunch shop brings traditional Japanese rice balls to France
Japanese convenience store packs a whole bento into an onigiri rice ball
Coffee-infused rice for rice balls and curry? Taste-testing a recipe from Japan’s coffee experts
Tokyo store serves stunning kakigori ice dessert that looks and tastes like an onigiri rice ball
Will frozen bento onigiri be Japan’s next big convenience store food trend?【Taste test】
Domino’s now sells tapioca boba pizza in Japan, and we’re so very, very confused【Taste test】
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Our two-day struggle to buy the cutest onigiri rice balls in Tokyo
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
The polite way to eat onigiri rice balls sparks debate online
Mr. Sato has crazy idea to replace tapioca balls with fish roe in bubble tea【Taste test】
How good is this popular wooden onigiri mould, made by a Japanese rice specialist?
Onigiri without the nigiri – Japan’s traditional rice balls get an update