Fujitsu Ltd. has drawn renewed calls from investors to shed more light on the departure of former President Kuniaki Nozoe after the Tokyo Stock Exchange ended a probe Tuesday into the conflicting reasons given by the firm.

The TSE ended its probe of Fujitsu after determining the company didn't mislead investors enough to warrant further action. In response, the nation's largest provider of computer services said it will strive to disclose information appropriately.

Fujitsu last week said it ousted the former president because of possible ties to a company with an "unfavorable reputation," rescinding the earlier explanation he quit for health reasons. Nozoe's dismissal was inappropriate, according to his lawyer. The bourse's conclusions may prolong concerns over Fujitsu's transparency, said Mitsushige Akino, a fund manager at Tokyo-based Ichiyoshi Investment Management Co.