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Ex-ALSOK Guard Arrested in ¥135 Million ATM Theft

A surprise cash check backed by video evidence exposed insider abuse of access.

Overview

  • Police arrested Tsuyoshi Oyama, 57, on suspicion he stole ¥135 million from bank ATMs in Tokyo’s Chuo Ward.
  • The suspect was an employee of ALSOK’s on-site security subsidiary at the time and handled ATM cash collection and transport.
  • Investigators say the thefts took place over December 26–30, 2025, across several visits to the same bank’s machines.
  • A mid-January spot cash reconciliation found a large shortfall, and branch cameras showed him putting ATM cash into a bag when coworkers were not watching.
  • Police say he admitted taking the money and cited job dissatisfaction, saying he spent it on gambling, adult services, and luxury goods, while police and the company continue their inquiries.