TOKYO — Olympus said on Tuesday that it was suing 19 current and former executives and board members, including its current president, for around $50 million over an accounting scheme to hide losses going back more than a decade.

But in the latest indication that the Olympus scandal continues to follow a distinctly Japan Inc. approach to corporate governance, the company is letting the discredited president and the implicated board members stay on until later this year.

The president, Shuichi Takayama, was a longtime lower-level Olympus executive and board member until last November, when he was promoted to replace Michael C. Woodford, a Briton. Mr. Woodford was fired after blowing the whistle over the $1.7 billion accounting fraud.

Olympus said on Tuesday that Mr. Takayama, who has contended he knew nothing of the scheme, was being sued for 500 million yen, or about $6.5 million, on contentions that he failed to meet his fiduciary duties as a director while the fraud was under way.