
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 drugstore sells onigiri at pre-stupid era prices, but how do they compare to 7-Eleven?
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 1]
7-Eleven Japan’s sakura sweets season is underway right now!
Hey, 2020s kids! The ’90s have a sticker picture message waiting for you in Tokyo
Beautiful blue apple jam is taking the Japanese internet’s breath away!
Japanese woman stumbles on the power of the infamous “gaijin seat” phenomenon during flight
The results are in! One Piece World Top 100 characters chosen in global poll
Extreme budget travel! Can you do a good weekend trip to Taiwan with 50,000 yen (US$370)? – Part 2
7-Eleven Japan starts new temporary luggage storage service in over 300 branches
Find a red envelope on the ground? Here’s why you should never pick it up
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Is Sapporio’s Snow Festival awesome enough to be worth visiting even if you hate the snow? [Pics]
Japan has trams that say “sorry” while they ride around town…but why?
Tokyo Skytree turns pink for the cherry blossom season
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Japan’s new “Cunte” contact lenses aren’t pronounced like you’re probably thinking they are
Shibuya Station’s Hachiko Gate and Yamanote Line stairway locations change next month
Yakuzen ramen restaurant in Tokyo is very different to a yakuza ramen restaurant
Starbucks Japan adds new sakura Frappuccino and cherry blossom drinks to the menu
Japan’s newest Shinkansen has no seats…or passengers [Video]
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
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
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
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
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
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?
Japan Railways recently revealed ramen-style rice balls in its convenience stores