"We are eager to negotiate with Japan (on the trade dispute). We have been making such requests to Japan, but they have not been responding," Yoo said.

Under the new policy, Japanese firms need to go through more complicated procedures to ship such materials to South Korea, including filing more documents.

Japan's export restriction is widely seen as a retaliation against a Seoul court's ruling last year that ordered Japanese firms to compensate victims of their wartime forced labor, during Japan's 1910-1945 brutal colonial rule of the Korean Peninsula.

Tokyo says the export restriction did not come as retaliation and was inevitable due to South Korea's lax export control of sensitive goods. It has not, however, provided any piece of evidence behind the allegation.

Last month, South Korea filed a complaint with the World Trade Organization over Japan's unfair trade practices. Japan agreed to hold a bilateral consultation as the first step of the WTO dispute settlement.

If the two fail to narrow their differences within 60 days, the WTO Dispute Settlement Body will establish a panel to look further into the case.

In August, Japan also removed South Korea from its "whitelist" of trusted trading partners, which are granted preferential treatments in the trade of sensitive industrial materials. Last month, South Korea also took Japan off its own list of trusted trade partners in an apparent tit-for-tat measure. (Yonhap)