TOKYO - Rubber declined on Monday amid concern that disruption to car production caused by Japan's earthquake and tsunami will continue and curb demand for the commodity used in tires.

The September-delivery contract lost as much as 3.4 percent to 404.9 yen a kilogram ($4,930 a ton) before settling at 405.2 yen on the Tokyo Commodity Exchange.

Toyota Motor Corp expects production for all models to return to normal by November or December as the carmaker struggles with supply-chain disruptions caused by the disasters.