
“Built-in” bentos are currently transforming the konbini food scene.
Unprecedented events are currently occurring in the convenience store world, at least according to our reporter Masanuki Sunakoma, who says this is the first time he’s felt such excitement while browsing the aisles. The reason for Masanuki’s excitement is the fact that he no longer has to use chopsticks while eating a bento boxed lunch because now not one but two convenience store chains have packaged up their bentos for handheld convenience.
In April, Lawson packed an entire bento into a rice ball, which he absolutely loved, and it was so popular that it was re-released on 1 October due to popular demand. On this same day, Family Mart released a new “Bento Sandwich“, which packs a whole bento inside two slices of bread, and it turned everything Masanuki thought he knew about bentos and sandwiches on its head, so there was only one thing for it — a new-style bento showdown.
▼ Masanuki headed to both chains where he picked up the new Bento Sandwich at Family Mart…
▼…and the “Whole Mentai Noriben” onigiri rice ball from Lawson.
A quick overview of the ingredients revealed that this was going to be a filling taste test, with the sandwich described as a “Bento Sandwich with all the Side Dishes” and the onigiri containing an entire noriben, consisting of tartar sauce, okaka gohan (rice with bonito flake seasoning) fried white fish, fried chikuwa (Japanese fishcake), rolled omelette, and nori seaweed, with a layer of mentaiko (spicy pollock roe) for extra flavour.
Looking closer at the ingredients in the sandwich, Masanuki noticed that this too seemed to contain familiar bento ingredients, with fried chicken, fried chikuwa, croquettes, fried noodles, and tartar sauce in the mix. At 338 yen (US$2.27) it was slightly more expensive than the rice ball, which retails for 322 yen.
▼ Placing these unconventional bentos side by side filled Masanuki with a sense of excitement.
Describing them as “built-in bentos”, Masanuki wasn’t sure which one would win his favour as they both looked incredibly appetising. Picking up the sandwich first, he took a bite and chaos spread throughout his palate.
The more he chewed, the more the flavours burst out, confusing his senses in an odd but delightful way. Though the onigiri rice ball had a similar effect when he tried it, there was a clear difference between the two — the depth of the seasoning.
The onigiri was surprisingly modest in flavour, but the bread in the sandwich was richly seasoned, as was every ingredient inside it, with the fried chicken, croquettes and yakisoba noodles coated in a variety of delicious sauces.
The only thing providing some refreshment from the rich flavours was the seaweed, but it too had been fried, resulting in all the ingredients fighting for dominion over Masanuki’s palate. It was chaotic but Masanuki was totally fine with that as it was incredibly delicious, and the more he ate it, the more he found himself becoming addicted to the flavour.
After eating both “built-in” bentos, Masanuki came to the conclusion that they were both winners, in different ways. The sandwich offers a Western twist on the Japanese bento, swapping out rice for bread so it’s more of an out-there experience, while the rice ball is more like stuffing a whole bento into your mouth all at once.
Both are delicious and of excellent quality, though, so he highly recommends trying them to see which one appeals to you most. With convenience store chains now rethinking the traditional bento, who knows where they’ll take us to next? Whatever happens, though, one thing’s for sure — Masanuki will be there to try them, because no matter what time of day it is, he never lets a good meal pass him by.
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 packs a whole bento into an onigiri rice ball
Onikun: Epic onigiri so big they’re half demon, half rice ball
Weiner Onigiri: Japanese convenience store rice ball has a surprise in store for Mr Sato
What makes this new Japanese convenience store chain better than 7-Eleven?
It’s a Japanese boxed lunch in the palm of your hand with the new bento rice ball
Shinto shrine gate parfaits that tell your fortune now being served in Tokyo
New Transforming Business Card case brings anime mecha to Japanese work meetings
Studio Ghibli adds new finger puppets to its anime merchandise collection in Japan
Go to hell! …at a limited time historical art exhibit coming to Osaka
Lego PlayStation recreates Sony’s original console, makes unusual choice for games to salute
New Japanese ice cream is Ballin, in more ways than one
Kyoto temple bans visitors from wearing kimono
New Pokémon anniversary song is 22 minutes long, features all 1,025 Pokémon species [Video]
Starbucks Japan releases new coffee table book featuring 18 of the most unique stores around the country
Mister Donut releases new sweet potato doughnuts in Japan, and we’ve ranked them from best to worst
Solo travel in Japan: Hidden beer garden in Tokyo is a haven for single visitors
A real-world Pokémon Poké Ball hotel is opening in Japan at a still-secret location [Video]
Japan’s first fall color forecast for 2026 is here!
Studio Ghibli unveils new anime calendars and diary planners for 2027
One Piece Day 2026 brings new art, music, and new cast announcements
Tamagotchi evolves into a ring for its 30th anniversary, preorders now open
Starbucks Japan reveals new Tsukimi Moon-Viewing drinkware and gifts for autumn 2026
Family Mart releases Famima convenience store products nationwide, but which ones are worth buying?
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
Japan’s final Penguin Suica train cards have already shipped, and when they’re gone, they’re gone
Sushi Bus: Japan’s first conveyor-belt bus lets you eat sushi while sightseeing around Tokyo
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 approves foreign resident visa renewal fee increases of up to 967 percent, starts soon
Japan tripled its departure tax to fund tourism but is using the money on cherry blossoms and bears
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】
In celebration of Onigiri Day, we compare rice balls from three different convenience stores
Convenience store onigiri rice balls become even more expensive…but are they worth it?
Onigiri Bread from Japanese convenience store chain changes everything we know about rice balls
Are high-end convenience store rice balls really packed with more ingredients?
New bento bread makes us rethink sandwiches…and Japanese bentos
Which Japanese convenience store has the best plain onigiri rice balls?
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?
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Finally! Japan’s big three convenience store chains announce rice ball price reductions
The best-selling rice ball at Family Mart is…SPAM onigiri?
Japanese convenience store showdown – Who’s got the best ikura rice balls?【Taste test】
Japanese convenience store chain releases new Immoral Konbini Food for a limited time
Which Japanese convenience store has the best salted onigiri rice balls?
The surprising semi-secret ingredient in many Japanese convenience store rice balls: oil
7-Eleven Japan’s aged brown rice onigiri reveals a different side to convenience store food