After five years of restructuring by Sony Corp., Chief Executive Officer Kazuo Hirai said Tuesday he is confident the once-dominant electronics giant will see an operating profit of ¥500 billion, the largest in two decades, in the current business year.

"Achieving such a high goal poses a significant challenge for both managers and employees. But I am confident that, over the past five years, we have established a foundation which enables us to achieve the goal," Hirai said at a news conference at Sony's headquarters in Tokyo, where he discussed the company's progress toward its three-year business plan through March 2018.

Sony had set an operating profit target of ¥500 billion or more and a return on equity of 10 percent or higher as two goals of the medium-term business plan announced in February 2015.