Dozens of former and current employees of Recruit Co., a major information service firm, have been accused of failing to declare billions of yen in profits from selling their holdings of the company's unlisted shares, sources close to the case said Sunday.

Each worker is believed to have obtained tens of millions of yen in profits when they sold the shares to an association of Recruit employees holding the company's shares, the sources said.

The National Tax Agency suspects that hundreds of other former Recruit workers may also have failed to declare such income, they said, and the agency's probe is continuing.