Japan's Toyota Motor made a record profit of $21bn, its third in a row, but warned profits would fall sharply next time.
Toyota is forecasting a 35% drop in net profit.
Toyota, the world's biggest selling motor company, has done well out of a weak yen, which has made its goods cheaper in other countries.
Last year, one US dollar would buy 120 yen, but over next year is expected to buy just 105 yen.
Toyota is also expecting demand in key markets such as the US and China, to weaken this year.