Shintaro Ishihara, the new head of Nippon Ishin no Kai (Japan Restoration Party), remained true to his China-hawk form Tuesday by saying Japan should "simulate" possessing nuclear arms as a deterrent to Beijing.

Ishihara's remark during a news conference at the Foreign Correspondents' Club of Japan in Tokyo, is likely to ruffle feathers both at home and abroad, especially amid the territorial row with China over the Senkaku Islands.

"It's high time Japan made simulations of possessing nuclear arms," Ishihara said. "That would become a form of deterrent" against China's possible military encroachment.