A noted professor who regularly provides commentary on an NHK AM radio show has resigned from the program in protest over the public broadcaster's demand that nuclear power not be discussed until after the Feb. 9 Tokyo gubernatorial election.

Toru Nakakita, a professor of economics at Toyo University in Tokyo, said the director of the "Radio 1" morning news program told him Wednesday to change the subject of his commentary, after he had submitted an outline for a segment to air the following day.

The segment, "Business Tenbo" ("Business Outlook"), which is broadcast every weekday morning, features guest commentary from academics in the fields of business and economics. For the Thursday morning edition, Nakakita was planning to talk about the rising operating costs of nuclear power worldwide, in light of a recent surge in insurance premiums and safety costs. He was also intending to discuss the fact that in Japan the cost of decommissioning nuclear plants is not adequately reflected on the utilities' balance sheets.