Updated breach estimate and scope:
Education services provider Benesse Corp. said personal data on 22.6 million customers were stored on a smartphone owned by the Tokyo systems engineer under arrest on suspicion of theft and illegal copying of customer data.
While announcing the figure Monday, Benesse, a subsidiary of Benesse Holdings Inc., said the stolen information — the worst data leak in Japan’s history — also included customer data on its group firms’ online-shopping website Benesse Life Smile Shop and message board website Benesse Women’s Park.
Read more on Japan Times.