Hokuto Bank: a CD-R with ATM records from a merged branch was lost, including account numbers and balances of 3,977 customers

At the former Aikawa branch, merged into the Takanosu branch on September 7, the journal CD-R taken from the ATM removed on September 4 went missing. The bank found no sign of theft and said it was most likely thrown away by mistake. [1]

It held 24,147 transactions from November 23, 2019 to June 7, 2020 involving 3,977 customers: names, bank codes, branch and account numbers, amounts and balances after each transaction, and for transfers the sender's name and phone number and the receiving account. The data was encrypted and needed special systems to read. [1]