In Japan, due to strict and differing car classifications and emission regulations, or lack of main consumer demand, some international models or certain regional models aren't sold in Japanese Domestic Market. Grey importers are trying to import some of these models into Japan but it is permitted due to lack of restrictions imposed on them, unlike in other countries. Among the grey-imported vehicles in Japan are pickup trucks like Toyota Tundra, Nissan Navara and Subaru BRAT, which aren't officially sold in Japan.