Despite a stagnant domestic economy, the nation's major automakers managed to boost consolidated profits for the April-September period, thanks to a weaker yen and cost-cutting efforts, according to earnings reports released by Tuesday.

Nissan Motor Co. said consolidated net profit jumped 24.9 percent to 287.71 billion yen, a record net profit for the April-September period, on the back of brisk auto sales both at home and abroad.

Its consolidated pretax profit doubled from the same period last year to 323.5 billion yen, and consolidated operating profit surged 84.5 percent to 348.3 billion yen, the nation's No. 3 carmaker said.