
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!
Japan now has gyoza doughnuts, and they taste like no other doughnut we’ve tried before
This train station bento boxed lunch shop has been in business for nearly 100 years
Japanese criminals are now using crabs to hunt for burglary targets
Does one of Japan’s favorite chocolate brands work with the Pringles chocolate hack?
The average age of Japan’s hikikomori shut-ins is getting older, survey shows
Police cracking down on outdoor seating in Tokyo’s liveliest street market neighborhood[Video]
A letter from our reporter’s deceased mother arrives at just the right time
Final Fantasy VII’s Tifa’s bar pops up in real-world Tokyo, and we stop by for drinks[Photos]
Woman in Japan breaks into home of complete stranger just to slap him in the face
Nintendo’s Super Mario throws out first pitch at professional baseball game in Japan[Video]
Japan enters Golden Week vacation period, survey shows one in three plan to ride it out at home
Studio Ghibli releases crystal glass paperweights featuring Totoro and the Catbus
Japanese hair salons going bankrupt in record numbers
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Samurai Coffee: Try Edo period coffee once enjoyed by Japanese warriors
Sega opening 65th anniversary store in downtotn Tokyo with deep-cut game merch
Beard Papa goes beyond just matcha with its new premium green tea cream puffs
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
Japan’s best conveyor belt sushi restaurant of seven years ago has now, finally, come to Tokyo
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Brand-new Pokémon manhole covers coming to help the recovery of a disaster-stricken part of Japan
Japan’s awesomely beautiful Alpen Route snow corridor is now open
Injuries on stairs in Tokyo highlight an overlooked design flaw
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
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
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
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
New “wet” potato chips revolutionise the snack industry in Japan
Potato chip-flavor fried chicken now on sale at convenience stores in Japan
Typhoon Lionrock delays production of Calbee potato chips
Cheap paradise: Daiso’s microwave potato chip maker is healthy, easy, and delicious【Taste test】
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