Mitsubishi Electric Corp. has confessed to four decades worth of fraudulent testing and improper design of electrical transformers used at nuclear power stations, thermal plants and substations that power trains.

According to Mitsubishi Electric, it shipped 8,363 transformers from the factory between 1982 and March 2022. About 40 percent of those, or 3,384, were fraudulently tested or improperly designed.

Mitsubishi Electric admits to faking test data on transformers | The Asahi Shimbun: Breaking News, Japan News and Analysis