
Simple hack from a former bank clerk in Japan.
Japan has a reputation for being one of the safest places on the planet, where you can leave your belongings unattended and lost wallets are regularly handed in without a single yen missing.
That’s not to say theft doesn’t ever occur, however, as we saw recently when a man was held down by passengers after stealing another man’s wallet on the train, so it doesn’t hurt to stay alert and prepared, even in a country as reputedly safe as Japan.
One person who’s definitely prepared is Twitter user @012_shiro, who picked up a handy tip from a former bank clerk on how to keep the cash cards in your wallet safe in the event of a theft, and after sharing the information with others online it quickly went viral.
https://twitter.com/012_shiro/status/1317337380563476480The tweet above reads:
“To avoid putting my savings at risk, I’ve put six sheets of paper with random four-digit numbers on them in my wallet. Because, in a worst case scenario, if I lose my wallet and someone with bad intentions picks it up, my cash card can’t be used and will have to be re-issued if the wrong PIN is input multiple times. (From a former bank clerk).”
@012_shiro followed up by saying cash card rules differ depending on the financial institution, but the general rule is that you can enter an incorrect PIN up to three times a day, and if six mistakes are made in total, the card can’t be used.
Of course, @012_shiro says you should call your bank immediately to put a hold on your cards if you do find you’ve lost your wallet, but until that call is made, this simple tip can help to safeguard your savings and give you some peace-of-mind in a worst-case scenario.
A lot of people online agreed with this sentiment and vowed to use the system themselves, just in case.
“I love this, it’s like installing a self-defence trap inside your wallet!”
“Wow. I learned something today!”
“Doing this right away!”
“I often write random numbers on the back of the card. Now I might add a piece of paper too just to confuse them even more!”
“Thank you – this is a great life hack!”
Staying a step ahead of thieves is often the best way to outwit them, so no matter where you are in the world, it doesn’t hurt to use an anti-theft measure like this to help safeguard your money.
After all, traps like these have been known to work — just ask this wily 78-year-old Japanese woman, who set a trap for a thief and got him arrested after he took thousands of yen in toy money from her safe.
Source: Twitter/@012_shiro via Jin
Featured image: Gahag
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!

Japan enters Golden Week vacation period, survey shows one in three plan to ride it out at home
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Studio Ghibli releases new anime keychains that are like miniature figurines
Retro-style Evangelion T-shirts coming to Uniqlo sister brand GU[Photos]
Japan’s Mister Donut Japan tries its hand at Taiwanese-style street food donuts
Japan enters Golden Week vacation period, survey shows one in three plan to ride it out at home
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Studio Ghibli releases new anime keychains that are like miniature figurines
Retro-style Evangelion T-shirts coming to Uniqlo sister brand GU[Photos]
Japan’s Mister Donut Japan tries its hand at Taiwanese-style street food donuts
Bandai cancels gacha/blind-buy system for anime cosmetics, will let fans choose what they buy
Shinto shrine will bless your bike helmet and give you a sacred bike helmet stamp
Dorayaki from 89-year-old Japanese confectionery shop is one of the best sweets hidden in Tokyo
Only five branches of Japan’s beef bowl giant Matsuya serve milk shakes, but how do they taste?
Tifa’s Final Fantasy VII bar is going to pop up in real-world Tokyo
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Studio Ghibli launches huge new anime movie T-shirt collection with special design details
Brand-new Square Enix Cafe to open in Tokyo…and in Los Angeles too!
Japanese convenience store gives away free ice cream with creative ad at Shinjuku Station
Hello Kitty is now a transforming truck robot[Photos]
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
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
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
Bandai cancels gacha/blind-buy system for anime cosmetics, will let fans choose what they buy
Shinto shrine will bless your bike helmet and give you a sacred bike helmet stamp
Dorayaki from 89-year-old Japanese confectionery shop is one of the best sweets hidden in Tokyo
Only five branches of Japan’s beef bowl giant Matsuya serve milk shakes, but how do they taste?
Tifa’s Final Fantasy VII bar is going to pop up in real-world Tokyo
Lipton releases… Pudding Milk Tea in Japan?!?
Live-action Ghibli Princess Mononoke stage play tickets are now on sale
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Police in Japan summoned to deal with bank intruder…who is also a deer[Video]
War in Iran threatening Japan’s pudding production
Tokyo store makes you to pass a quiz in order to buy Pokémon cards as part of anti-scalper policy
McDonald’s and Gundam team up for customized anime mecha and fried chicken sandwiches[Video]
Second-generation sumo burger coming to Burger King Japan with return of Baby Body Burger
Brand-new Square Enix Cafe to open in Tokyo…and in Los Angeles too!