The ferocity of the slide adds to fears that the world's second biggest economy is tipping into a self-feeding spiral after contracting at annual rate of 12.7pc in the fourth quarter. A deflation 'mind set' has begun to gain a grip on the Japanese psyche once again. The government said land prices have fallen by an average 12pc in Tokyo, Osaka, and Nagoya since October. "We don't sees any signs of an early recovery," said Takeshi Minami, chief economist for the Norinchukin institute. "Exports to Asia and especially China have crumbled just as badly as those to the US. That...