
Bento ingredients taste different when they’re eaten with one hand.
Japanese convenience stores are great places to pick up an onigiri rice ball, but you’ll need some extra muscle to pick up the newest one at Lawson, which crams an entire bento inside it.
Released on 2 April, the “Whole Mentai Noriben” contains all the same ingredients as a nori bento, more commonly known as “nori ben“, with a layer of mentaiko (spicy pollock roe) for extra flavour.
The noriben ingredients — tartar sauce, okaka gohan (rice with bonito flake seasoning) fried white fish, fried chikuwa (Japanese fishcake), rolled omelette, and nori seaweed — are pointed out on the packaging.
Priced at 322 yen (US$2.10), this onigiri is slightly more pricey than your regular rice ball, but once it’s out of the packaging, the sheer size of it indicates that it’s worth the extra money.
The instructions on the package state this is a meal that tastes better when heated, so we microwaved ours at 500 watts for 45 seconds.
The rice ball kept its shape throughout, and what’s more, it looked exactly as it did in the photos for it, with each ingredient perfectly placed in its designated position.
Peering inside for a better look, we could see the rice was well seasoned with bonito flakes beside the fried fish, while the mentaiko was partnered with the fish cake and omelette. From this point of view, it looked more like a bento than a rice ball, earning full points for presentation.
According to Lawson’s official website, this product was designed with “taipa” (“time performance“) in mind, meaning that it aims to provide a high level of satisfaction in a short amount of time. It certainly looked like it would be faster to eat than a noriben, and when we folded it back together, we felt as if we might be able to stuff the whole thing into our mouth if we were really pressed for time.
It felt odd yet exhilarating to hold an entire bento in one hand like a sandwich, and when we took a bite out of it, our taste buds were hit with a variety of textures and flavours. First, there was the crunch of the fried fish, accompanied by the tart tartar sauce, followed by the soft fishcake and mentaiko, and the slightly sweet omelette, which created a cascade of bento flavours in one mouthful.
The rice seasoning packed less of a punch than expected, but the mentaiko and tartar sauce really stimulated the taste buds, and the whole thing was insanely delicious.
Rather than being a harmonious pairing, it was a chaotic one, with every ingredient fighting for attention in a way they don’t usually when eaten as a bento. However, this dissonance worked beautifully to keep the palate entertained all the way through to the very last bite.
▼ It was like every mouthful was a flavour bomb filled with surprising explosives.
By condensing a bento into a rice ball, the flavours seemed even more intense than usual, but if you prefer lighter flavours, you can always try the new “Pork Egg (Sea Chicken Mayonnaise)” variety.
▼ The rice balls catch the eye with their eyes.
So next time you’re at Lawson keep an eye out for the new rice balls — they’re tasty, filling, and a lot more exciting than the Lawson 100 Wiener Onigiri we tried two years earlier!
Related: Lawson
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 ]














Japanese convenience store releases a new bento sandwich, but is it better than a bento rice ball?
Weiner Onigiri: Japanese convenience store rice ball has a surprise in store for Mr Sato
Onikun: Epic onigiri so big they’re half demon, half rice ball
Convenience store onigiri rice balls become even more expensive…but are they worth it?
Are high-end convenience store rice balls really packed with more ingredients?
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Japan’s first all-matcha ramen restaurant is now open in Kyoto【Photos】
Family Mart releases huge range of cute sweets for Cat Day in Japan
A robot joins the team at a fast-food restaurant, but in an unlikely city in northern Japan
This Nara workshop has been making deer crackers for more than 100 years and offers tours【Photos】
Downloads of 39-year-old Guns N’ Roses song increase 12,166 percent thanks to Gundam
A spotlight on Japanese singles figure skating: Jumping into the 2026 Olympics【Pt. II】
Japan has a new bar just for people thinking about quitting their jobs, and the drinks are free
We learn the terrifying secret of Silent Hill ramen
Transforming kanji watches not so great for telling time, perfect for being awesome
Yokai are descending upon Tokyo this spring in the latest immersive art experience
Three beautiful places to see Japan’s plum blossoms after starting your day in downtown Tokyo
Cherry blossom forecasts map shows Japan’s OTHER sakura season is starting right now
New Studio Ghibli stamps leave an impression on your stationery…and your heart
Japanese women sound off on their minimum height requirements for a husband【Survey】
Huge Evangelion Unit-01 head appearing in lights in Japan to celebrate anime’s 30th anniversary
Kyoto planning surprise late-night inspections of Airbnb-style rentals to fight overtourism
Japanese movie theater chain’s popcorn earns highest Grand Prix quality certification
Japan’s most famous Mt. Fuji view park cancels cherry blossom festival because of overtourism
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Japan releases first official sakura cherry blossom forecast for 2026
10 times to avoid traveling in Japan in 2026
Archfiend Hello Kitty appears as Sanrio launches new team-up with Yu-Gi-Oh【Pics】
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
China’s don’t-go-to-Japan warning looks to be affecting tourist crowds on Miyajima
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Studio Ghibli releases new “komorebi” plush toys from Princess Mononoke and Spirited Away
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
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
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
Onigiri Bread from Japanese convenience store chain changes everything we know about rice balls
Which Japanese convenience store has the best plain onigiri rice balls?
In celebration of Onigiri Day, we compare rice balls from three different convenience stores
Which Japanese convenience store sells the best onigiri rice balls?【Taste test】
Are Family Mart’s new “exquisite” rice balls worth the high price tag?
The best-selling rice ball at Family Mart is…SPAM onigiri?
Will frozen bento onigiri be Japan’s next big convenience store food trend?【Taste test】
Survey ranks convenience store rice balls – salmon, sea-dwelling poultry & plants steal the show
Which Japanese convenience store has the best salted onigiri rice balls?
New bento bread makes us rethink sandwiches…and Japanese bentos
The surprising semi-secret ingredient in many Japanese convenience store rice balls: oil
Lawson now sells old rice as “vintage” onigiri in Japan
We find the best “homestyle” onigiri at a super local chain of convenience stores
7-Eleven Japan’s aged brown rice onigiri reveals a different side to convenience store food
Japanese convenience store showdown – Who’s got the best ikura rice balls?【Taste test】
The difference between onigiri rice balls in Tokyo and Osaka
It’s a Japanese boxed lunch in the palm of your hand with the new bento rice ball
Leave a Reply