Shipments of aluminum rolled products are forecast to decrease 11 percent next fiscal year to the lowest in 23 years on a slump in demand from carmakers and machinery producers, an industry group said Friday.

Shipments may drop to 1.80 million tons in the year beginning on Wednesday, down from an estimated 2.03 million tons this fiscal year, the Japan Aluminium Association said in a statement.

It is the third straight year of decrease and the volume would be the lowest since the year that ended in March 1987, according to the association.