
We find out if this sell-out hit product is worth the hype.
Onigiri rice balls are commonly made by hand in Japan, but they can be difficult to create, especially when the rice is hot as it makes it hard to hold, distorting the shape. That’s where rice specialists Akomeya are here to help, with an exclusive rice ball mould that’s so popular it sells out every time it becomes available.
According to reviews from customers, the mould helps to make beautiful onigiri that look like something you’d buy at a fancy department store. There are two sizes available, small and large, and as we were curious to find out if the mould lived up to the hype, we played things safe by opting for the smaller version.
▼ Sylvanian Families characters not included.
First impressions were undeniably good, as the cypress wood had a beautifully fresh, woodsy aroma. This not only adds flavour to the rice but helps to improve it, as the wood absorbs excess moisture so you can enjoy the rice in its optimal state.
To use the mould, first moisten it with water and then fill the cavities with rice up to the halfway point. Then add your favourite filling, like an umeboshi pickled plum, as seen on the left of the image below, before covering it with rice (right, below).
Though the rice was piping hot it had no trouble settling in place and the filling stayed put in the centre which was impressive, seeing as it can move about a bit during hand-moulding. To determine which was better — wood-moulded or hand-moulded — we crafted a rice ball by hand, using cling wrap to keep our fingers clean and fashion it into a triangular shape.
▼ The rice was very hot to hold, even through the plastic wrap.
Comparing the completed rice balls, we found that the rice balls made with the mould (right, below) had a more beautiful shape.
Upon tasting them both, the wood-moulded onigiri (right, below) won yet again, as the grains of rice were noticeably fluffier. Looking closely, you can see that the grains of rice in the hand-moulded variety are flattened, while the grains from the wood mould remained plump, despite being packed down quite tightly.
As for the filling, it seemed to be confined to one small section in the hand-moulded type, whereas the wood mould (right, below) helped to disperse it more evenly, creating a more well-balanced flavour.
We definitely preferred the wood mould, rating it higher in terms of the resulting flavour and texture of the rice ball. However, would it still do well with different ingredients?
▼ Left to right: Plum Chirimenjako (dried young sardines), Green Onion and Bacon, Cheese Okaka (finely chopped dried bonito flakes), Furikake (dried seasoning) with Nori (seaweed).
As you can see, the wood mould did a fantastic job yet again, but we did find it had one weakness — when you add rice that’s been blended with large ingredients, like green onion and bacon, it creates gaps in the rice ball, causing it to break apart when you hold it in your hand.
That’s easily fixed though, because instead of adding the ingredients to the rice before it gets to the mould, simply add them as a filling instead and you should have no problems.
▼ Oh, and you’ll want to have a rice scoop handy to help pat the rice in, as it’s hot to touch.
After using the mould, we can safely say it exceeded our expectations, so much so that we’re kind of lamenting the fact we didn’t purchase the larger size as well. Luckily for us, though, the large size is still an option as it’s now back in stock, along with the small version, after months of being out of stock due to popularity. It certainly is worth the hype, and deserves to be on your shopping list when visiting Japan, where you can purchase it at Akomeya stores and online, priced at 2,200 yen (US$15.11) for the small and 2,530 yen for the large.
Related: Akomeya Tokyo, Rakuten Market
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!











Which Japanese convenience store has the best salted onigiri rice balls?
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
The polite way to eat onigiri rice balls sparks debate online
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
Tapioca onigiri brings boba to the world of rice balls
A real-world Pokémon Poké Ball hotel is opening in Japan at a still-secret location [Video]
Tamagotchi evolves into a ring for its 30th anniversary, preorders now open
Family Mart releases Famima convenience store products nationwide, but which ones are worth buying?
Japan’s most popular curry rice restaurant chain, Coco Ichibanya, might be for sale
Finally! Japan’s big three convenience store chains announce rice ball price reductions
One Piece Day 2026 brings new art, music, and new cast announcements
Japan Railways announces unlimited-ride train pass for fall travel
Studio Ghibli unveils new anime calendars and diary planners for 2027
Onsen Egg Bukkake Udon Ice Cream makes us rethink everything we thought we knew about sweets
Hobonichi unveils new 2027 planners, diaries and stationery with One Piece, Suica Penguin, Hello Kitty and a must-buy Mini Techo
Japan’s final Penguin Suica train cards have already shipped, and when they’re gone, they’re gone
Solo travel in Japan: Hidden beer garden in Tokyo is a haven for single visitors
Japan approves foreign resident visa renewal fee increases of up to 967 percent, starts soon
Farewell Final Ceremony announced for Tokyo’s life-size Gundam statue, will stream live
Family Mart releases new Human Made Cup Noodle in Japan, with freebies for Nigo fans
Hikaru Utada sings new song in Shinkansen commercial for Japan’s Supreme Class cabins
Mister Donut releases new doughnuts that look and taste like Japanese sweet potatoes
12-year-old British girl who went missing in Tokyo found safe after visiting anime sites around Yokohama
7-year-old boy left behind on Mt. Fuji by his own dad
Sushi Bus: Japan’s first conveyor-belt bus lets you eat sushi while sightseeing around Tokyo
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
Japanese toilet aims to attract foreign tourists but not everybody is happy about it
New Japanese vending machine at Shinkansen station sells cups of ice on platform
Study finds hundreds of people in Indonesia legally named after Naruto, Inuyasha, other anime stars
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Onikun: Epic onigiri so big they’re half demon, half rice ball
Lawson now sells old rice as “vintage” onigiri in Japan
Space Onigiri: Do these long-lasting Japanese rice balls taste any good on planet Earth?
The 10 best types of onigiri rice balls to try in Japan【Survey】
Japanese convenience store packs a whole bento into an onigiri rice ball
Japanese drugstore sells onigiri at pre-stupid era prices, but how do they compare to 7-Eleven?
Which Japanese convenience store has the best plain onigiri rice balls?
Onigiri without the nigiri – Japan’s traditional rice balls get an update
Beyond rice balls: How to make an edible onigiri rice cat【Video】
The surprising semi-secret ingredient in many Japanese convenience store rice balls: oil
The difference between onigiri rice balls in Tokyo and Osaka
Japanese vending machine sells…onigiri cakes!?
Drinkable rice balls appear in Japan, allow you to chug the country’s favorite snack on the go
Onigiri in Paris: Small lunch shop brings traditional Japanese rice balls to France