CompaniesFresh allegations follow acounting irregularities at the world's largest motor makerCompliance issues at Kyoto-based motor maker Nidec include unauthorized design changes and falsification of inspection data (Photo by Kosaku Mimura). TOKYO/Kyoto, Japan -- Japan's Nidec is suspected of having engaged in quality tampering involving more than 1,000 cases, extending a series of compliance issues at the world's largest motor maker that were previously centered on accounting irregularities, Nikkei has learned Tuesday.