"The yen fell against the dollar as the Bank of Japan pumped more money into financial markets after the nation's biggest earthquake," said Phillip Futures in a report. A weaker yen would make Japan's growth-driving exports cheaper and boost companies' overseas profits when repatriated, which would encourage companies to retain domestic production capabilities instead of relocating overseas. Japan's bourse has nosedived in the aftermath of a monster tsunami spawned by a 9.0 magnitude quake that devastated large swathes of the nation, with death tolls forecasted to exceed 10,000. Tokyo stocks fell below the 9,000 mark Tuesday with the Nikkei index plunging 11.03 percent, or 1,061.35 points, to 8,559.14. It fell 6.18 percent on Monday.