Three of the company’s assembly plants in Japan were already in operation and the rest resumed production Monday, Toyota announced.
The firm plans to continue with the current capacity until 3 June, with production halting during the Golden Week holiday between late April and early May.
The plants that resumed operation Monday included sites in quake-hit Miyagi and Iwate prefectures.
A component supply crisis has drastically reduced auto production in Japan and enforced a slowdown overseas in the wake of the 11 March disasters, which badly damaged the country's economy.
It is expected to last several months, as are continued power outages.
Many key component manufacturers are based in the worst-hit regions of Japan, their facilities damaged by the 9.0 magnitude earthquake or hit by the tsunami that followed.
Not only Japanese production has been affected. Factories as far away as Britain, the United States, Turkey, France, Australia, Poland and the Philippines have also been hit by the lack of components.