
Almost all food tastes and smells better when it’s warm, doesn’t it?
Man, French fries are just the best, aren’t they? Especially when they’re served at room temperature…wait, no, I’ve got that wrong. It’s baked potatoes that taste best when they’re served without even a trace of warmth, right?
Of course not. As a matter of fact, I’m pretty sure that preferring either of those foods lukewarm is one of the tests they use to catch robots that are masquerading as human beings. So why, then, are we supposed to eat potato chips that aren’t warm?
Japanese snack maker Calbee asked itself that question, and was apparently unable to find a good answer. Instead, it’s come up with an awesome solution: potato chips sold in special bags that you pop into the microwave and heat up before eating.
Calbee’s new Renji de (“In the Microwave”) series went on sale February 19, with the first offering being Renji de Poterich Rich Butter Soy Sauce Flavor, made with butter from Japan’s northern dairy island of Hokkaido.
While you could just tear open the bag and start eating the chips, like a Philistine, the wiser choice is to make a small (two-centimeter/0.8-inch) tear at the top of the bag, then place it in the microwave for 40 seconds.
Once the time is up, rip open the rest of the bag…
…and you’ll be greeted by an intense, buttery aroma wafting up from your toasty warm potato chips.
Not digging the fusion flavor of soy sauce for potato chips? In just a few weeks, Calbee will be expanding the lineup with a second microwavable chip flavor, the Renji de Pizza Potato, which packs 25 percent more cheese than the company’s preexisting pizza-flavored chips.
The Butter Soy Sauce chips are priced at 152 yen (US$1.40), while the Pizza Potato is just slightly more at 173 yen. Both types of microwavable chips are exclusive to Family Mart convenience stores, and since Japanese convenience stores always have a microwave available for customers to use, you can heat your chips up right there and enjoy a warm snack on the go.
Now we’re just keeping our fingers crossed that Calbee eventually adds its sushi-flavor chips, or maybe its green tea chocolate ones, to the Renji de line someday.
Top image: YouTube/Calbee カルビー公式チャンネル
Insert images: Press release, YouTube/Calbee カルビー公式チャンネル
Follow Casey on Twitter for more delicious stuff from Japan that costs less than two bucks.





Japan’s new microwavable potato chips are amazing, but the best thing isn’t how they taste
Microwavable potato chips recalled after three days due to fire hazards
Pizza Potato crisis causes turmoil in Japan for chip-lovers and opportunists alike
Japanese potato chip Rubik’s Cubes coming soon
Japanese snack food maker introduces new potato chips…for women!
Tokyo sweets store has a “350% Pudding Soft Serve”, and people are going wild for it
Studio Ghibli adds new Jiji’s baby plush toy to its anime merchandise range in Japan
The Japanese city where ordering grilled chicken doesn’t guarantee you’ll actually get chicken
Beautiful off-the-beaten-path spot near samurai castle in rural Japan looks like a Monet painting
Japanese figure skating star Yuzuru Hanyu and Winne-the-Pooh announce crossover merch line [Pics]
Shinto shrine in downtown Tokyo announces cosplay ban
Wagyu ramen for foreign tourists appears in Kabukicho, with a very high price tag
Hello Kitty x Godzilla Happy Meals are coming to McDonald’s, but not in Japan [Video]
This beautiful Okinawa beach gives you the best of both worlds when visiting the prefecture [Pics]
McDonald’s Japan’s new Chiikawa Happy Meal figures are here![Photos]
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
Anime fan in Japan arrested for ordering and cancelling over 4.3 billion yen in anime merch
Starbucks Japan teams up with Traveler’s Company for new stationery and goods collection
Japan’s new beer glass is designed to force you to drink…water [Video]
Beautiful Totoro bonsai figure needs no watering, makes soothing rain showers whenever you want
End of a manga era as Weekly Shonen Jump’s circulation drops under one million
This beautiful rural Japan river is a great alternative to touristy summer retreats [Photos]
Studio Ghibli releases new Kiki’s Delivery Service Jiji music box for anime fans
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japan now has human refrigerators inspired by Japanese vending machines
Hatsune Miku collaborates with Hokusai’s art in new Vocaloid ukiyo-e illustration series [Pics]
New Shinkansen luggage drop-off system begins in Japan, making train travel even easier
Studio Ghibli releases anime T-shirts that pay homage to one of Hayao Miyazaki’s most personal films
Air-conditioned dress shirts arrive in Japan to save working professionals from sweltering heat
Japanese Shinkansen becomes an overnight hotel for three nights this summer
Cup Noodle unveils first-ever cold-water instant ramen in Japan
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
99-year-old woman rescued while attempting to climb Mt. Fuji
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]
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】
Japan’s newest potato chip flavor: Convenience store fried chicken
We try Japan’s new “wet potato chips” — A moist revolution or soggy defeat?
Get ready for a cherry-blossom-flavored spring with Sakura Butter potato chips from Calbee!
Let’s talk about chips: Japanese netizens weigh in on the ten best potato chips in the country
The perfect summer snack – potato chips that are made to be cool, literally
Potato chip-flavor fried chicken now on sale at convenience stores in Japan
New “wet” potato chips revolutionise the snack industry in Japan
Cheap paradise: Daiso’s microwave potato chip maker is healthy, easy, and delicious【Taste test】
Typhoon Lionrock delays production of Calbee potato chips
Calbee Potato Chips pouch impresses us and makes us want more chips
Natto-flavored potato chips are now yours for the taking (or trashing) in Japan
Edamame potato chips appear in Japan, made with the king of edamame, dadachamame
New “Rainbow Potato Chips” are disappointingly not multi-colored, but delightfully multi-flavored
Witness the power a typhoon has over a bag of potato chips in this time-lapse video
Calbee teams with gourmet French chain for uni and dried roe potato chip flavor