Mitsubishi Electric Corp. President Takeshi Sugiyama said Friday he will resign to take the blame for decades of "organizational misconduct" after the Japanese electronics conglomerate found it had cheated on inspections for air conditioners and compressors for train use.

Speaking at a news conference, Sugiyama apologized for the company's failure to address its misconduct that may have lasted over three decades since around 1985, saying that the latest fiasco had caused great problems and concerns.

"I reached the conclusion that it is necessary for me to step down so the company can work to regain trust under a new leadership," Sugiyama said. "We have to say it is organizational misconduct."