Skip to content
Submit incident
AII-1000-99303
Under investigationA regulator, court or police has opened a formal inquiry and reached no finding yet.Supporting sources are pending verification.

AI-Promoted Investment Scams Defraud Japanese Men

Two Japanese men were reportedly defrauded in separate investment scams using AI-based marketing and promises. A man in his 50s lost approximately 5.4 million yen through an AI investment diagnosis system, while a man in his 70s lost approximately 29 million yen after seeing advertisements for AI-enabled trading. Both cases are under police investigation.

November 2025 Β· Akita Rinko Police Station Β· Fraud, scams and manipulation
November 2025
AII-1000-99303
Quick facts
Category
Fraud, scams and manipulation
Country
Japan
Date
November 2025
Drafted by
Raidu Incident Detection

What happened

In November 2025, a man in his 50s in Tsu, Mie Prefecture, encountered an investment scam through an AI diagnosis system. He was approached by someone claiming to be manager 'Sudou Miyoko' of global investment company KKR, who offered special investment treatment. He created a fraudulent investment account and transferred approximately 5.4 million yen across eight transactions from November through January 15, 2026, via internet banking.

In November 2025, a man in his 70s in Akita City found an advertisement for a securities company claiming AI-enabled trading capability. After accessing the site, a LINE account with a Japanese female name was added, and the contact described short-term trading with guaranteed profits. He was defrauded of approximately 29 million yen.

Reported impact

The 50-year-old man discovered the fraud when he could not withdraw assets from the site and reported it to police.

The 70-year-old man lost approximately 29 million yen to the investment scam.

Classification

Category
Fraud, scams and manipulation
Industry
Financial and insurance services
Country
Japan
Harm status
Actual harm
Intent
Intentional
Timing
Unknown
Harm types
Economic or property
Harmed
Consumers
Failure modes
Manipulation or dark pattern
Consequences
Police investigation
AI systems
AI investment diagnosis system, AI trading system

Sources and evidence

Sources not yet published

This record was researched and written by the Index from original reporting. Its sources are still being verified by an editor, and they are listed here once that check is complete. Until then the record carries no reviewer.

How sources are verifiedSuggest a source for this incident