A Chinese association of agricultural exporters and importers has voluntarily imposed restraints on exports to Japan of shiitake, one of the three products behind a trade row between the two countries, association sources said Wednesday.

Tokyo and Beijing remain split over the dispute, which also involves imports of tatami straw and stone leeks into Japan, but the move by the Chamber of Commerce for Importers and Exporters of Foodstuffs, Native Produce and Animal Byproducts is expected to affect their negotiations.

According to the sources, chamber executives decided Nov. 6 to reduce the volume of mushroom exports to Japan in November and December to below the average for those months over the past three years.

They also decided to set the lowest export price at $2,300 (290,000 yen) per ton.