Prime Minister Shinzo Abe and his government face continued questions in the Diet about state-owned land sold to a nationalist school operator at a big discount.

Moritomo Gakuen, bought the 8,770-sq.-meter plot last June in Toyonaka, Osaka Prefecture, for ¥134 million, roughly 14 percent of its appraised price. The plot is intended for an elementary school slated to open in April, with the prime minister's wife, Akie, as its honorary principal.

Abe has denied any involvement in the land deal. Responding to questions about the issue from Democratic Party lawmaker Nobuyuki Fukushima in the Diet on Friday, Abe said he "would quit as prime minister and as a Diet member" if he or his wife were involved.