Education service provider Benesse Corp. said personal data on 22.6 million customers were stored on a smartphone owned by a Tokyo systems engineer under arrest on suspicion of stealing and illegal copying customer data.
While announcing the figure Monday, Benesse also said the stolen information also includes customer data on its group firms’ online-shopping website Benesse Life Smile Shop and message board website Benesse Women’s Park.
The Metropolitan Police Department arrested Masaomi Matsuzaki, 39, on suspicion of downloading and copying the personal data of Benesse customers onto his smartphone from the Tokyo branch of affiliate Synform Co. on June 17.
Earlier, Benesse had said data on some 7.6 million customers were confirmed stolen and the potential size of the theft could reach 20.7 million. But police investigators determined Matsuzaki had acquired even more data than that. The latest data theft is considered the worst ever. Matsuzaki admitted selling the data to name-list traders, according to the police. He reportedly used the money on gambling.
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