The transport ministry will not certify any new truck or bus from Mitsubishi Fuso Truck & Bus Corp. equipped with the firm's latest F-type wheel hub until the hub's safety is confirmed, according to ministry officials.

The decision by the Land, Infrastructure and Transport Ministry means Mitsubishi Fuso will not be allowed to put its new models on the market even if they develop them.

It constitutes a blow to the manufacturer at a time when Japan's truck and bus makers are pressing ahead with the development of new models so they can clear new stiffer exhaust gas regulations, slated to take effect in October next year.