www.itmedia.co.jp/mobile/articles/2604/01/news136.html

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KDDI子会社で2461億円の架空取引、なぜ7年間も見過ごされたのか？　社員2人の巧妙な手口と高橋元社長の「懸念」（1/3 ページ） - ITmedia Mobile

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This page reports on a 246.1 billion yen fraudulent circular transaction scheme discovered at KDDI subsidiary G-Plan, operated by two employees from August 2018 to December 2025. The employees created fictitious advertising transactions between upstream and downstream agencies, with 99.7% of sales being fake. They cycled payments through multiple companies to generate fees, disguising non-existent clients as real ones. The fraud went undetected for seven years due to limited personnel involvement, sophisticated concealment, and insufficient internal verification systems. Even KDDI's former president expressed concerns about the abnormal growth.