Kumagai Gumi: unauthorized access to its servers, and what leaked is under investigation

1. 2024-01-09

   It confirmed that some servers it operates were accessed without authorization by a third party. [1]

2. 2024-01-15

   It announced the case. Its crisis management committee set the policy and it is investigating with outside specialists. It filed a report with the police and reported to the Personal Information Protection Commission. [1] [2] [3]

It is still checking what leaked, and has not stated the scale of the damage or whether information flowed out. [1] [2]