Nidec Corporation said forensic investigators found no clear technical evidence, such as server logs, that hackers extracted data from its Taiwan subsidiary, Nidec Chaun Choung Technology Corp., during a ransomware attack first disclosed on June 24, 2026. The Kyoto-based motor maker's follow-up disclosure, filed August 4, said the group behind the attack posted a partial list of folder and file names, not the files themselves, on a dark-web site tied to the attackers.
Because that list includes data Nidec cannot verify as unexposed, the company said it is "difficult to rule out" the possibility of an external information leak, even without direct proof of exfiltration. As of August 4, Nidec said it had not confirmed that the dark-web site had disclosed the actual data corresponding to the folder and file names on that list, a narrower claim than saying the data has not surfaced anywhere.
Nidec said the incident has caused no material disruption to production or shipping at the Taiwan subsidiary, which continues normal operations. The company expects the effect on its consolidated results to be minor, though it will disclose promptly if that assessment changes. Nidec said it will keep monitoring the situation and report any material new findings as they emerge.