On July 13, the Financial Services Agency compiled the findings of its “Study Group on Information Security,” which discusses information security measures at financial institutions. Its primary objective is for the Financial Services Agency, as the supervisory authority, and financial institutions nationwide to share a common understanding of information security risks and countermeasures. It will encourage financial institutions to strengthen their information security measures further.
(Nikkei Computer)

The key point is that past cases will be disclosed to each financial institution. This means that the excuse that they were unaware of the risk will no longer be accepted.

The information technology industry will also likely become more active in providing solutions that address this development.