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Spotting AI-Made Phishing Mail and Fake Ads — The "Bad Japanese" Tell Is Gone

Published: November 8, 2026 · Updated: November 8, 2026 · About 5 min read · Beginner

Key points

  • AI-written phishing mail has natural Japanese. "The wording looks odd, so it must be fake" no longer works as a test
  • Check the destination, not the wording. Do not tap the link — open the official app or site yourself
  • Investment ads using a celebrity's or official's face and voice, promising "government approved" or "guaranteed profit", are a known fraud pattern the police warn about
  • "Fake boss" fraud uses a real executive's name to pull staff into SNS groups and demand transfers. Never decide a transfer from a message alone
A shocked man looking at a smartphone while holding a credit card

(Lead) Phishing mail used to give itself away with awkward wording. Now that AI writes the text, that tell is disappearing. What should you look at instead? This guide replaces "read the wording" with checks based on actions and destinations.

The tell that disappeared

Generative AI writes natural, polite business Japanese. A real-looking name or company logo is no longer evidence either. Judge by what the message asks you to do, and where it tries to send you.

Check the destination, not the wording

  • Do not tap links in email or SMS. For banks, deliveries and shopping, open the official app or your bookmarked official site yourself
  • On any page asking for a transfer, check whether the destination account is in an individual's name
  • Look at the sender's actual address (not the display name) and whether it matches the official domain

The fake-ad pattern: a famous face and "government approved"

The National Police Agency warns about fraudulent ads misusing the images and voices of government figures. "Government-approved investment", "government guaranteed", "recommended by a celebrity" — this combination is a fraud pattern. Before investing, check whether the business is registered with the Financial Services Agency, and use the consumer hotline (188) or the police consultation line when in doubt. Real investments do not need "act now, limited offer" pressure.

Fake-boss fraud: the name is real, the instruction is not

Police also warn about fraud using real executives' names and company names to pull people into SNS groups and demand transfers. The countermeasures are simple:

  • Never complete a transfer or contract on the basis of a message alone
  • Share suspicious instructions with someone else in the company
  • Decide the transfer procedure and approvers in advance, in normal times

Summary: today's checklist

  • I check notices by opening the official app or site myself, never via message links
  • I treat "government approved" and "guaranteed profit" investment ads as a fraud pattern
  • Transfer instructions are never executed from a message alone
  • I have 188 (consumer hotline) and #9110 (police consultation) saved as contacts
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Q1. In the AI era, what is the right way to judge a suspicious message?

See the answer

Text and visuals can both be made convincing by AI. Choosing the destination yourself is the test that still works.

Q2. An ad says "government-approved investment, recommended by a celebrity". The right response is:

See the answer

The police warn about fraudulent ads misusing officials' images and voices.

Q3. You are invited to an SNS group under your president's name and asked to transfer money:

See the answer

Police warn about fake-boss fraud using real names. Transfers follow the procedure and approvals.

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