Matsuya App Breach Forces App and Website Shutdown
Matsuya says up to about 2.38 million registered users' names and phone numbers may have been exposed during a breach that is now under investigation.
Overview
- The company detected external unauthorized access on Oct. 28 and suspended its official app and website the next day to stop further intrusion.
- Matsuya disclosed on Oct. 30 that the app’s management system was breached and that up to roughly 2.38 million app registrants may have had names and phone numbers leaked.
- In-app services such as Matsubenet bento reservations and mobile ordering remain unavailable and the company has given no timetable for restoring them.
- Matsuya said it does not hold customers’ credit card information and is continuing a verification process to confirm the full scope and specifics of what was accessed.
- The outage affects a nationwide gyudon chain whose app is widely used for reservations and orders, raising risks of nuisance calls and disruption to customers who rely on mobile ordering.