NAGOYA (Kyodo) Toyota Motor Corp. is considering reopening more plants for car assembly on April 18 or later as parts supply, which has been largely held back since the March 11 disaster, is expected to improve, sources said Wednesday.

After suspending all of its domestic plants on March 14, Toyota resumed manufacturing three models, including the Prius, at two plants on March 28.

The automaker is still undecided on the size of its planned output increase. Currently, 15 plants have been idled.