
Nagoya stationery company caught by surprise at overwhelming demand for anti-chikan item.
Nagooya-based Shachihata’s product lineup consists of the sort of things you’d expect from a stationery company. Pens, stamps, hanko, the personal seals used on Japanese legal documents in place of a signature. Shachihata has them all.
But the company’s hottest-selling product right now isn’t for leaving marks on paper, but on perverts. Called the Anti-Nuisance Stamp, it’s being marketed as a way for women to fight back against chikan, Japan’s infamous train gropers.
Development of the Anti-Nuisance Stamp started about three months ago, when some Japanese Twitter users began tossing around the idea of marking chikan with pricks from safety pins, with proponents of the plan asserting that they could be used to leave marks in the skin of offenders. However, many women were reluctant to start stabbing people, even with something as small as a pin, and so Shachihata’s designers decided to put together a non-piercing alternative.
The Anti-Nuisance Stamp uses a special UV ink that leaves no visible mark to the naked eye, but shows up under a blacklight. Ostensibly, this would make it harder for the chikan to notice exactly where he’s been marked, thus making it harder to wash off and allowing for easier identification by the police or other authorities. Shachihata also decided on a capless design, in order to make the marking process as swift as possible, lest the chikan escape unmarked.
On August 27, Shachihata released its first run of Anti-Nuisance Stamps, in order to gauge market response to the concept, priced at 2,500 yen (US$23). Before the end of the day, they were completely sold out, with buyers quickly snapping up all 500 units in the initial batch.
With spoke with a Shachihata representative, who acknowledged that some people have expressed concerns about the possibility of men being marked by the stamps as part of false groping accusations. “In regards to the idea of false accusations, we recognize that it is a very complex situation,” the representative said, “but we feel it is necessary for us to make it clear that we feel such crimes [train gropings] are inexcusable.”
The representative went on to say that Shachihata was unprepared for the response from customers to be as quick or as strong as it was. “We were honestly surprised. We never imagined we would sell the entire batch on the first day.” He also explained that even more so than contributing to the marking of chikan, the company hopes that the existence of the stamps will contribute to an environment in which gropers feel less emboldened to attempt attacks in the first place, and that hopefully buyer will never have to actually use them.
While the Anti-Nuisance Stamp is sold out for now, the company says it will be examining customer feedback while improving the design for increased effectiveness and ease of use, and it’s a safe bet that they’ll be making more than 500 units for the second batch.
Images: Shachihata
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]



New anti-chikan cellphone stickers let you mark train gropers with sign of shame
Japan’s anti-train groper badge design contest announces this year’s winners
Plus-size Japanese model lets her anger fly in new-type anti-train groper posters
Japan Railways to release new anti-groper smartphone app to help victims before chikan gets away
Anime-style art encourages young women to report Japanese train gropers in new posters
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Universal Studios Japan is giving Frieren anime fans the chance to make unforgettable memories.
7-Eleven Japan has a new Creamy Iced Cafe Latte that’s a hit on social media
7-Eleven Japan releases new “mix-and-drink” matcha latte… that comes with a risk of choking
Sanrio Hotel Floria isn’t actually a hotel, but it’s still a must visit for fans traveling in Tokyo
Two of Kyoto’s famous temples tackle streetside trash with solar-powered trash cans
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Starbucks Japan releases special limited-edition summer drinks… at only 30 stores
Lawson transforms convenience store food with massive katsu burger and an insane curry bread
Super Mario Galaxy Happy Meal toys now available at McDonald’s Japan
East Japan Railway announces plans to abolish magnetic-strip tickets
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
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
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
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
Colour Hunting: The hot new street photography trend changing how we see Japan
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
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
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
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
Japanese schoolgirl seeking crowdfunding, art submissions to produce anti-train groper pins
Japanese woman finds a depressing way to prevent train gropers from targeting her
A creepy new wrinkle to Japan’s chikan train groper schemes, and how to counter it
All Japan Railway Tokyo trains to finally get security cameras starting this summer