Auto supplier Mitsubishi Electric announced that starting 31 January, the company was being investigated by Japan's Ministry of Defence, Cabinet Satellite Intelligence Center and Japan Aerospace Exploration Agency following revelations that the company overcharged the three parties for expenses.

"Mitsubishi Electric is fully cooperating with the investigations," it said in a statememt.

"The impact of this matter on Mitsubishi Electric's business performance is currently uncertain, but the company intends to disclose the impact as soon as the situation is better understood."

The supplier's financial results for the first nine months and third quarter of the current fiscal year will be announced on 2 February as originally scheduled.