The maker of the Prius hybrid forecast a full-year net profit of 1.7 trillion yen, up from its earlier estimate of 1.55 trillion yen. That was already up from an earlier 1.45 trillion outlook.
Upward revision
Toyota said in a statement that the upward revision was mainly "based on the current trend of financial results, due to changes in foreign currency exchange rates and the upward revision of our sales plans".
Japanese exporters have enjoyed a boost since the November election of Donald Trump as US president, with expectations his big-spending, tax-cutting plans would fire inflation and force the Federal Reserve to hike interest rates.
However, the latest forecast is far below the record 2.31 trillion yen net profit in the year to March 2016.