Nidec Finds More Suspected Cases of Accounting Fraud (1)

Nidec Corp. has discovered more suspected cases of improper bookkeeping, including some involving a Swiss subsidiary, adding to a scandal that’s threatening the listing of the once-celebrated Japanese auto gear maker.

The world’s top maker of mini motors set up an external probe this year after finding accounting irregularities at two subsidiaries. On Friday, it said it unearthed new problems: its car inverter business may have for years underreported customs duties on second-hand goods exported to China, and a Swiss unit may have exported products without completing the required paperwork.

Auditor PwC Japan was unable to obtain enough evidence to ...