Suspected ransomware takes down network and email at Osaka university, forcing class cancellations

What happened and what to do

The Record reports that Osaka Metropolitan University announced on Tuesday (6 October 2026) the cancellation of classes after an outage left its internal network, email and several administrative and academic systems unavailable. The institution treated the episode as a suspected ransomware attack, which requires isolating affected systems and preserving evidence before any restoration.

For a company, the case calls for concrete measures placed before an incident. The first is network segmentation, so that an infection in one area cannot reach the rest, with access controls between administrative, operational and communication zones. The second is immutable backups with periodic restore tests, measuring the real recovery time of email and critical systems. The third is centralizing endpoint, authentication and traffic logs in a monitoring dashboard with alerts for anomalous behavior, such as mass file creation and unusual use of administrative credentials.

It is also worth formalizing a response plan with defined roles, emergency contacts outside the main network and procedures for communicating with customers, students or employees. Quarterly simulation exercises help reveal gaps before a real event exposes them.

How the consultancy can help

Diagnosis of ransomware exposure across network, email and critical systems, with a dependency map, review of segmentation and backups, and restore testing. Then deployment of centralized monitoring and an incident response plan, operated in your own environment.

Next step

If your organization depends on similar networks, email and administrative systems, send a short description of your scenario and receive a scoped proposal from Wendelmaques.