Netizens are impressed with how manufacturer admits fault and tackles the problem scientifically.
Japanese rice crackers, or senbei, are delicious when eaten plain or wrapped with a bit of seaweed. The crunchy snacks are so versatile that people even think it’s a good idea to stuff them full of edible wasps.
They usually come in large packets, but when Japanese Twitter user @moyu1001 opened hers, she discovered large black spots on one of the senbei. Unsure if they were burnt spots or patches of mold, she sent the package back to the manufacturer, Kameda Seika.
▼ The company promptly replied @moyu1001 with a lengthy
explanation of their manufacturing process (translation below):
亀田製菓のまがりせんべいを買ったら、大きめの黒いカビなのかコゲなのかわからない部分を見つけて、初めて見たレベルの大きさだったから、一応連絡して現品を送りました。
— こうやもゆ(もゆ山) (@moyu1001) February 13, 2018
こんなに…こんなに丁寧に対応してくれたよ…。そしておせんべいも送られてきました。一生推すね…。 pic.twitter.com/gWndBxwVAo
“Dear Madam,
We wish to express our gratitude for your continued success in the future and we greatly appreciate your continued patronage of our products.
We sincerely regret that you’ve experienced such unpleasantness caused by our ‘18-piece magari senbei’. We deeply apologize and truly thank you for letting us know about it.
We’ve graciously received the product from you on 5 February.”
(continued below)
▼ There’s so much politeness oozing from the letter that any customer,
angry or not, would have forgiven them on the spot.
“1. Product confirmation
Upon inspecting the sample that you’ve generously provided using our company’s microscope, we’ve confirmed that there were no traces of mold spores or fungal characteristics. In order to further identify the cause of the black spots, we sent the product to our in-house quality assurance department to undergo Fourier Transform Infrared (FTIR) analysis. This process involves the discharging of infrared rays towards the target, allowing us to determine its characteristics based on infrared absorption or emission rates.
The analysis conclusively revealed that the spots’ constituents matched starch and protein profiles of ‘magari senbei’, and that they are essentially the result of charring.”
(still continued below)
▼ So it’s not mold, but burnt stuff?
“2. Causative factors
During the roasting process, the batter travels on a wire mesh conveyor belt and gets heated by 20-meter long infrared burners situated below and above the belt.
Vibration from equipment operating continuously at high temperatures might have resulted in charred product fragments dropping onto the surface of the senbei.
Our company conducts daily health and safety checks, performing tests before and cleaning procedures after operation. Even during manufacturing, we strictly adhere to quality standards and conduct regular checks. Products unable to meet specifications are swiftly removed, but as your product has shown, it proved to be inadequate. We apologize for the inconvenience caused.”
(yes… still continued below)
▼ You can almost feel the writer of the letter kneeling apologetically.
“3. Preventative measures
The wire mesh conveyor belt is wiped once daily before operation commencement, but we’ve decided to thoroughly clean it again after lunch break. Depending on the belt’s condition, we’ll perform additional cleaning procedures to ensure such events do not occur again.
To provide ease of mind to our valued customers when consuming our products, we will endeavor to prevent such accidents from happening again. We greatly appreciate your continued patronage.
We’ve provided a fresh packet of senbei for you to enjoy.
In closing, we hope for your health and good fortune.”
@moyu1001 was glad the black spots didn’t turn out to be fungi, but more than that, she was rather impressed with the exhaustively detailed letter from the manufacturer. Japanese companies treat complaints very seriously, which is why some even go as far as apologizing for minor 20-second-early train departures.
Source: Twitter/@moyu1001 via Hachima Kikou
Featured image: Twitter/@moyu1001
Insert images: Pakutaso (1, 2, 3)




Japanese company creates scratch and sniff cards that smell like the bellies of cats and dogs
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Two of Kyoto’s famous temples tackle streetside trash with solar-powered trash cans
Starbucks Japan releases special limited-edition summer drinks… at only 30 stores
Anne Hathaway creates PR frenzy in Japan after mentioning Tottori in Devil Wears Prada interview
East Japan Railway announces plans to abolish magnetic-strip tickets
Lawson transforms convenience store food with massive katsu burger and an insane curry bread
Luxury houseplant fraud leads to arrest of Takamatsu man
Super Mario Galaxy Happy Meal toys now available at McDonald’s Japan
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
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
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Colour Hunting: The hot new street photography trend changing how we see Japan
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
Japanese convenience store shows us how to dress for the rainy season
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