From CNBC:
A major system failure has brought customer-facing banking services to a standstill at 128 Shinkin banks across western Japan, leaving customers unable to withdraw cash, make deposits or carry out online transactions.
The disruption began at around 1.30 pm on November 6, according to Shinkin Central Bank, which jointly operates the core banking systems used by the country’s shinkin banks. The outage has affected all 128 Shinkin banks located west of the Tokai region. ATM withdrawals and transfers, deposits and withdrawals at branch counters across 3,430 branches, and internet banking services have been suspended. There is no confirmed timeline for the restoration of services.