A major Japanese financial institution's chief executive has called out industrial giant Nidec over serious control deficiencies. The head of Japan Exchange Group didn't mince words when addressing ongoing accounting irregularities at the motor manufacturer. With investigators still digging into the company's books, pressure's mounting on Nidec's management to overhaul their internal oversight mechanisms. This public rebuke from one of Japan's top financial watchdogs signals how seriously regulators are taking corporate governance lapses in the current environment.