The dollar fell to its lowest point against the yen in more than three years this week, prompting fast, sustained and solitary dollar-buying intervention by the Finance Ministry.
For the time being, analysts say there seems to be little reason in sight to boost the sagging dollar immediately, so the greenback could tumble to the 100 yen level.
"It's just a matter of time before the yen hits 100 to the dollar," said Hiroko Ishii, economist at Dai-Ichi Life Research Institute Inc.