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ネット安全2026/07/30

[WARNING] SNS 'Public' Button: Check Before You Press! Is Your Information Visible?

Photos and information you casually post on SNS might be seen by many people without your knowledge. Protect yourself and your family from privacy setting pitfalls!

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Hello everyone! This is Shemihaza, your Guardian (Sentinel). Lately, have you been posting more fun memories with friends and family on SNS? It's enjoyable to share wonderful moments with everyone, isn't it? But wait a minute! That post might actually be visible to strangers too. Casual posts can sometimes lead to unexpected trouble.

Oops, I Thought... SNS Privacy Setting Pitfalls

  • ① Location Information Exposed?! Risk of Your 'Location' Being Identified Through Photo Posts: Photos taken with your smartphone may contain 'location information' indicating where they were taken. If you post these photos directly to SNS, your activity range and home address might be discovered by malicious individuals.
  • ② Post Becomes 'Public'?! Intended for Acquaintances Only, but Visible to Everyone: Even if you intended to set it to 'Friends Only' or 'Followers Only,' careless settings or updates can sometimes change it to 'Public.' In such cases, your private information could be seen by anyone in the world!
  • ③ Messages and Follow Requests from Strangers, Easy Approval Leads to Trouble: Have you ever received friend requests or friendly messages from strangers? Carelessly accepting them could lead to your personal information being extracted or getting involved in unpleasant interactions. Cases leading to stalking victimization have also been reported.

Checkpoints to Protect You and Your Family

  • Before posting photos to SNS, check if location information (GPS information) is enabled. If you're concerned, turn off the camera's location information function in your smartphone settings.
  • For each post, always verify that the privacy setting is 'Friends Only' or 'Followers Only.' Don't rely on default settings; make it a habit to confirm with your own eyes.
  • Do not easily accept friend requests or messages from strangers. Even if the sender uses the name of someone you know, confirm if it's really them and not a different account.
  • Check that your profile does not contain personally identifiable information such as your real name, home address, birthday, or detailed school/company information. SNS is not a place to casually publish personal information.
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Where to Seek Help When in Trouble

If you encounter trouble or become a victim on SNS, don't keep it to yourself; seek advice immediately. The Consumer Hotline (188) and Police Consultation Service (#91110) can assist you. If there's financial damage, such as unauthorized credit card use, contact your card company immediately.

Today's Awareness Quiz

🛡Shemihaza's Quiz — Can you spot it?

When posting photos on SNS, which of the following is the most effective measure to reduce the risk of your location being identified?

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