The automaker plans to add about two production days to its monthly operating schedule, totaling 10-15 workdays for the year, and hopes to lift output by an estimated 150,000 vehicles, the paper reported.

Toyota will present the proposal to its labor union, the Nikkei reported.

The disaster may have reduced Toyota’s domestic production by about 550,000 units as of May-end, according to the report. 

Toyota churned out 3.28 million vehicles in Japan in 2010, the business daily said. 

Toyota may decide to move up the date of expanded production starts and add more days, depending on its ability to procure parts, the Nikkei said.

Immediately after the earthquake and tsunami, Toyota faced a shortage of some 500 key parts, the report said.

Toyota cut the shortfall to roughly 30 parts this month, by providing production assistance to suppliers, the Nikkei reported.

Toyota’s domestic assembly plants are now operating at only around half capacity and the firm intends to up its operating rate back to about 70-80 percent in June and then raise it in stages, the paper said.