
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!

Virtual idol Hatsune Miku redesigned with look that adds new elements and brings back old ones
The top 10 graduation songs in Japan as chosen by current Japanese high school students
Komachi Shokudo: Japanese mum’s-style cooking for breakfast, lunch and dinner in Tokyo
Three kotatsu-boosting items to turn your home into a toasty fort against winter’s cold
Number of foreigners living in Japan has grown 50 percent in four years, hits historic high
Virtual idol Hatsune Miku redesigned with look that adds new elements and brings back old ones
The top 10 graduation songs in Japan as chosen by current Japanese high school students
Komachi Shokudo: Japanese mum’s-style cooking for breakfast, lunch and dinner in Tokyo
Three kotatsu-boosting items to turn your home into a toasty fort against winter’s cold
Number of foreigners living in Japan has grown 50 percent in four years, hits historic high
Is Daiso’s microwave Japanese rolled omelet maker worth your time and money? [Taste test]
Starbucks Japan opens new Kyoto store in Place of Scenic Beauty
Visiting Japan’s one-and-only, and only-for-a-limited-time, Dragon Ball noodle restaurant[Photos]
Japan has seven lucky taxis in Tokyo, and we just boarded one of them
The top 5 ice creams you should try at Family Mart convenience stores in Japan this summer
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Nine great places to see spring flowers in Japan, as chosen by travelers (with almost no sakura)
Starbucks Japan releases a new Cream Puff Frappuccino for a limited time
Starbucks Japan opens new cafe and art gallery in top Tokyo tourist neighbourhood
Is Japan’s Crab-shaped Cup Ramen Timer worth the hype?
Pizza Hut Japan teams up with creator of one of the country’s best kinds of ramen for ramen pizza
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
Silicone testicle covers banned from Japanese sauna following cups being left behind and on shelves
Japanese government planning higher ticket prices for foreign tourists at Tokyo National Museum
Pikachu and Eevee become handmade Lladró porcelain sculptures to celebrate Pokémon’s 30th birthday
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
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
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
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
Is Daiso’s microwave Japanese rolled omelet maker worth your time and money? [Taste test]
Starbucks Japan opens new Kyoto store in Place of Scenic Beauty
Visiting Japan’s one-and-only, and only-for-a-limited-time, Dragon Ball noodle restaurant[Photos]
Japan has seven lucky taxis in Tokyo, and we just boarded one of them
The top 5 ice creams you should try at Family Mart convenience stores in Japan this summer
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Wearable “kotatsu parka” is here to keep your whole body warm this winter
Häagen-Dazs Japan releases new ASMR ice cream called “Rocky Crunchy!”
The world’s best invention is now even better in the form of a specially built gaming kotatsu
Boys’ love at the temple? Sensual ikemen art that raised eyebrows in Japan now set to be removed
The odd phenomenon of some Japanese husbands making their wives put their socks on for them
Is downtown Tokyo’s crazy cheap 290-yen bento boxed lunch shop still around, and is it still cheap?
Humbug! Japanese wives in international marriages share what they hate about Christmas overseas
New Cup Noodle Rolling Stock automatically resupplies you with ramen for disaster preparedness