Toshiba acknowledged a systematic coverup, which began in 2008. Various parts of the Japanese company's sprawling business including computer chips and personal computers were struggling financially, but top managers set unrealistic earnings targets under the banner of "challenge," and subordinates faked results.
On top of its struggles in electronics, Tokyo-based Toshiba's prospects in nuclear power, one of its core businesses, were shaken after the 2011 Fukushima disaster set off public fears about reactor safety, making new nuclear plants unlikely in Japan. All 48 of the nation's working reactors are now offline.
Two past-CEOs also resign
Bowing deeply before flashing cameras at a news conference, CEO Hisao Tanaka kept his head lowered for nearly half a minute in a gesture meant to convey deep shame and contrition. Tanaka's predecessors, Norio Sasaki, now a vice chairman, and Atsutoshi Nishida, an adviser, also gave up their posts.
"We have a serious responsibility," Tanaka told reporters. The company will need to "build a new structure" to reform itself, he said.
Toshiba shares were up six per cent, recovering recent losses, as investors took the resignation as a sign the company would right itself.
The scandal highlights how Japan is still struggling to improve corporate governance despite recent steps to increase independent oversight of companies.
In 2011, Olympus Corp., which makes medical equipment and cameras, was embroiled in a scandal after its president Michael Woodford, a Briton, blew the whistle on the company's coverup of losses.
Toshiba has repeatedly apologized to shareholders and customers. It has set up an outside investigation group to analyze why the scandal happened and propose what needs to be done to prevent a recurrence.
The inflation of profits to meet targets was carried out not only on one or two projects, but across the board, sometimes because the projects weren't even breaking even, according to the report of an investigation.
"There was intense pressure to produce results under 'The Challenge' initiative," the report said. "So employees felt cornered into resorting to inappropriate measures."
Tanaka will be replaced by Masashi Muromachi, chairman of the board.
In the Olympus case, the company eventually acknowledged it hid 117.7 billion yen ($1.23 billion Cdn) in investment losses dating back to the 1990s. Woodford, the CEO, won some praise in Japan for his courage in bringing dubious old-guard company practices to light.Suggest a correction