Fujitsu Ltd. offered former President Kuniaki Nozoe around ¥270 million over a decade to serve as an adviser, his lawyers said Thursday, claiming the money was to keep him from talking about his abrupt resignation in September.

In an open letter addressed to Fujitsu, Nozoe's lawyers questioned why the "exorbitant compensation" was promised, adding the long-term contract barred him from speaking to the media or contesting claims made by the company about the reasons for his departure.

The letter disputes the explanation provided by the computer services firm in a news conference last week and demands that the company respond by May 6 to seven questions posed by the lawyers.