security debate has been lacking. (We) have just come to think about how we should cope with various developments in the real world, as people in other countries do," Nukaga said.

The long taboo of discussing going nuclear was most recently broached by Shoichi Nakagawa, LDP policy chief. Nakagawa said the public should debate whether Japan should develop atomic weapons in response to the North Korean threat.

Nakagawa's remark made headlines around the world and set off an intense barrage of media coverage that has lasted over a month.

Government officials, however, remain steadfast in upholding the nation's nonnuclear policy.