Prime Minister Naoto Kan will not step down despite his low public support rate, his wife and "adviser," Nobuko, said Wednesday.

"The public opinion poll is a kind of bullying. So quitting because he was criticized? I don't want that to happen," Nobuko Kan said at the Foreign Correspondents' Club of Japan in Tokyo.

"The support rate won't go below zero anyway," said the 65-year-old, who is known for her witty, blunt way of speech.