Japanese vehicle manufacturers– Toyota, Honda, Mitshubishi, Nissan, and Mazda, to name a few - have delayed plans to restart production, saying they cannot get the parts they need as component makers have downed shutters in the wake of the 11 March disaster.
Toyota will not restart production before 26 March. The company is also suspending overtime shifts and Saturday production at its 13 plants in North America.
Honda Motors says it has extended a production shutdown until at least 27 March.
Analysts said the shutdown would cost companies millions of dollars a day.
A spokeswoman for Honda said that the company now expects delivery of new vehicles in Japan to be delayed.
Assembling a car requires thousands of parts to be put together. These are provided by different suppliers. Most of the parts are shipped to the manufacturers a short time ahead of the assembly line requirements.