
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!
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
East Japan Railway announces plans to abolish magnetic-strip tickets
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
Anne Hathaway creates PR frenzy in Japan after mentioning Tottori in Devil Wears Prada interview
Shakey’s Japan creates matcha mochi, Kyoto fish, and Kansai Chili Con Carne pizzas
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
Super Mario Galaxy Happy Meal toys now available at McDonald’s Japan
Date handsome cockroaches in a new dating sim from one of Japan’s leading pest control companies
Bears appear at one of Kyoto Prefecture’s most popular tourist spots[Video]
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Ghibli’s No Face continues to demonstrate his generous character growth by dispensing soy sauce
Japanese rice cooker recipe gives us a tasty new way to enjoy vegetables and wieners
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
Colour Hunting: The hot new street photography trend changing how we see Japan
Japanese convenience store shows us how to dress for the rainy season
Body of missing American college student found in Kyoto mountains
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
Kanji ice cream becomes a sell-out hit in Japan
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Japanese convenience store Lawson launches new “mini supermarket” chain, L Minimart
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
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】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
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
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
Witness the power a typhoon has over a bag of potato chips in this time-lapse video
New “Rainbow Potato Chips” are disappointingly not multi-colored, but delightfully multi-flavored
Calbee teams with gourmet French chain for uni and dried roe potato chip flavor
Snack maker promises its extra-thick, extra-expensive potato chips are extra-delicious