According to reports, Kobe Steel has admitted to falsifying inspection data on about 20,000 tonnes of metals used in aircraft and automobiles in the latest quality scandal to hit corporate Japan.

Products affected included 19,300 tonnes of aluminium plate and extrusions; 2,200 tonnes of copper strip and pipe; and 19,400 cast and forged aluminium parts.

Mitsubishi Heavy Industries said that aluminium used in its regional passenger jet was among the shipments with falsified data. However, it said there was no safety issue and delivery of the jet — which is currently undergoing certification in the US after a troubled development — remained on schedule.