[WARNING] Is your 'key' safe? Beware of the pitfalls of reused and weak passwords!

Hello! This is Shemihaza, your guardian (sentinel). Now that life on the internet has become the norm, we use countless websites and apps, don't we? The 'password' needed to log in is as important as the 'key' that protects your home and possessions. But what if that crucial key was a 'number easily guessed by a thief,' or one that 'opens every door with the same key'? Don't you think that would be extremely dangerous?

Three Pitfalls That Make Your Passwords a Target

• ▸1. Reuse: Credentials leaked from one service can be tried against another. Japan's IPA advises against password reuse. We removed the old article's claim about a June 2026 KDDI breach because the supplied source did not verify it.
• ▸2. Predictable passwords: Avoid birthdays, names, short words, and simple number sequences. Use a long, different password for each service.
• ▸3. Stored credentials: When using a browser or password manager, protect and update the device. Avoid saving credentials on a shared device without appropriate access controls.

Checkpoints to Protect Your Important Digital Life

• ✓Verify that you have set a unique, 'long and complex password' for each service.
• ✓Check that your passwords do not use information easily guessed by others, such as your birthday, name, or simple words.
• ✓For important accounts, ensure you have set up 'two-factor authentication' (such as numbers sent to your smartphone, fingerprints, or facial recognition) in addition to your password.
• ✓If it's difficult to remember passwords yourself, consider using a secure 'password management app.'
• ✓If you receive login notifications you don't recognize or emails prompting password changes, immediately check the official website of that service and do not carelessly click on links in the email.

Where to Seek Help When in Trouble

If you suspect exposure or unauthorized access, contact the service through its official support channel and change affected passwords. Contact your card issuer promptly if payment details may have been misused. In Japan, #9110 is the non-emergency police consultation line. Outside Japan, use local support services.