The yen's drop lifted the dollar to 97.87 yen Thursday afternoon in Tokyo — its highest since mid-November — jumping 9 percent from 90 yen two weeks ago.
That's welcome news for Toyota, Sony and other exporters because a weaker yen inflates their foreign income when repatriated to Japan.
"The yen's rise has been abnormal, and so it is good it's starting to be corrected," said Toyota Motor Corp. spokesman Hideaki Homma. "What we want the most is a stable foreign exchange rate."
A major reason behind the yen's retreat is growing pessimism about the world's second-biggest economy, which contracted at the fastest pace in 35 years in the fourth quarter. Political uncertainty, with the prime minister's approval ratings in the single digits, has also rattled investors.
While the yen's retreat will bring some relief to exporters, it likely won't deliver a quick fix to Japan's deep economic woes, said Yuji Kameoka, senior economist with Daiwa Institute of Research in Tokyo.