The transport ministry on Friday inspected the headquarters of Nissan Motor Co. to examine whether the automaker's measures to prevent a recurrence of vehicle checks being conducted by unauthorized workers are being carried out properly.

It was to be the first inspection carried out at the carmaker's headquarters in Yokohama by the Ministry of Land, Infrastructure, Transport and Tourism since revelations emerged over the scandal, in which unauthorized inspectors conducted final car checks in violation of regulations.

The transport ministry, which inspected Nissan's domestic plants in November, has called on the company to strictly follow the rules. Transport minister Keiichi Ishii told a news conference Friday that ministry officials will question Nissan's management during the inspection.