Honda was forced to halt production at its Sayama plant near Tokyo on Sunday after the company was affected by WannaCry ransomware.
The two-day stoppage disrupted the production of around 1,000 vehicles.
“At this moment, there is no further impact confirmed, but we will continue to monitor the situation,” said Honda.
The global WannaCry attack started on 12 May and infected thousands of PCs at large institutions, including the NHS in the UK and FedEx.
WannaCry targeted Windows systems without a patch for MS-17-010.
The ransom demand from the attack was between $300 to $600, and the post noted there was code to “delete files” in the ransomware.