
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!

Tokyo Skytree turns pink for the cherry blossom season
Starbucks Japan adds new sakura Frappuccino and cherry blossom drinks to the menu
Hey, 2020s kids! The ’90s have a sticker picture message waiting for you in Tokyo
We tried 12 different gummy candies from a Japanese supermarket and found the most delicious one
Edible 10-yen coins become a hot new trend in Tokyo【Taste test】
Tokyo Skytree turns pink for the cherry blossom season
Starbucks Japan adds new sakura Frappuccino and cherry blossom drinks to the menu
Hey, 2020s kids! The ’90s have a sticker picture message waiting for you in Tokyo
We tried 12 different gummy candies from a Japanese supermarket and found the most delicious one
Edible 10-yen coins become a hot new trend in Tokyo【Taste test】
First live-action Spy x Family stage play video previews more in-costume cast members【Video】
Van Gogh’s Sunflowers are on permanent display in Tokyo, and here’s where you can find them
Top 100 manga of all time chosen by survey of 150,000 Japanese people
Enjoy Kyoto (Part 2) — Take a tour of Sumiya, the only remaining ageya building in Japan
Studio Ghibli displays The Boy and the Heron Academy Award Oscar in Japan for a limited time
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
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]
Now is the time to visit one of Tokyo’s best off-the-beaten-path plum blossom gardens
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Is Sapporio’s Snow Festival awesome enough to be worth visiting even if you hate the snow? [Pics]
Japan has trams that say “sorry” while they ride around town…but why?
Sakura Totoro is here to get spring started early with adorable pouches and plushies
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Poop is in full bloom at the Unko Museums for cherry blossom season
Japan’s newest Shinkansen has no seats…or passengers [Video]
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Archfiend Hello Kitty appears as Sanrio launches new team-up with Yu-Gi-Oh【Pics】
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
China’s don’t-go-to-Japan warning looks to be affecting tourist crowds on Miyajima
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
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
First live-action Spy x Family stage play video previews more in-costume cast members【Video】
Van Gogh’s Sunflowers are on permanent display in Tokyo, and here’s where you can find them
Top 100 manga of all time chosen by survey of 150,000 Japanese people
Enjoy Kyoto (Part 2) — Take a tour of Sumiya, the only remaining ageya building in Japan
Studio Ghibli displays The Boy and the Heron Academy Award Oscar in Japan for a limited time
Burning through cash just to throw things away tops list of headaches when moving house in Japan
Gacha machine backpack is Japan’s hottest new fashion statement
The etiquette rules for visiting Shinto shrines in Japan
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan complexly raises prices, will now charge for takeout bags
12 toilet oddities around the world that surprise Japan
Shimane has a secret hot spring town that feels like stepping into an old Japanese film
Japan just had its first same-month foreign tourist decrease in four years