TOYOTA'S quarterly profit more than doubled to 313.9 billion yen (US$3.2 billion) as cost cuts and better sales worked with a weakening yen to add momentum to the automaker's comeback.

Toyota Motor Corp, which last year reclaimed the title of world's top-selling automaker, said yesterday that it expects the strong results to continue in its new business year that ends March 2014. It projected a 1.37 trillion yen profit, up from 962 billion yen for the year ended in March.

The annual earnings result was better than the average forecast of 912 billion yen in a FactSet survey of analysts and also outdid the company's own forecast for 860 billion yen profit. Toyota reported a 121 billion yen profit for the January-March quarter of the previous year.

A recent plunge in the yen, brought about by the economic and monetary policies of Japanese Prime Minister Shinzo Abe who took office late last year, is a boon for Japanese exporters such as Toyota because it boosts earnings from overseas. The US dollar has gained about 20 percent against the yen and is now trading at nearly 100 yen.

But Toyota President Akio Toyoda warned competition remains tough, while crediting "Abenomics" as helping automakers like "a wind that's blowing to push us forward."

Toyota has undergone hard times in recent years, starting with the massive recall fiasco which hurt its image in the crucial US market and came on the heels of the financial crisis that also slammed its business. Then the automaker's production was devastated by the March 2011 earthquake and tsunami in northeastern Japan. But the maker of the Prius hybrid and Camry sedan has been gradually recovering.

"In the years since my succession as president in June 2009, we have faced many challenges. For Toyota, this was a period of perseverance but also a period of learning through extraordinary and invaluable experiences," Toyoda said.

He said he was far from confident Toyota was on a path to sustainable growth, and noted it was just "at the starting line."

Analysts warn that Toyota faces intense competition from a powerful Hyundai of South Korea as well as more established US automakers General Motors Co and Ford Motor Co. They are all fighting for a slice of the pie in growing markets such as Asia and Africa.

Toyota officials were quick to say that only a small part of its improved fortunes came from a favorable exchange rate.

Toyota's vehicle sales improved in all regions globally, including the US, Japan, the rest of Asia and Europe.