Plant engineering firm Ebara Corp. has been accused of hiding 540 million yen in income over three years through fiscal 2002, including roughly 300 million yen in suspected slush funds, it was learned Wednesday.

Ebara released a statement saying it will file an appeal against the accusation by the Tokyo Regional Taxation Bureau and denying it had received any slush funds.

According to sources, the secret funds in question centered on a contract Ebara landed for the construction of a waste disposal facility in Nagareyama, Chiba Prefecture.