South Korean officials have visited Washington to explain their concerns about Japan's export curbs.
Director-General for Bilateral Economic Affairs of the South Korean Foreign Ministry Kim Hee-sang met senior officials of the US State Department on Thursday. They included Deputy Assistant Secretary for Korea and Japan Marc Knapper.
Kim told reporters he explained the impact from the restrictions. He said, "I think this meeting was a good opportunity for the US to understand South Korean concerns regarding this issue."
Kim did not give details on the US reaction. But he said it took strong interest in the matter, as South Korea and Japan are both important allies for Washington.
South Korea has also dispatched the deputy chief of the presidential National Security Office, Kim Hyun-chong to Washington.
The US government has not yet officially stated its view on Japan's stricter export curbs. But State Department spokesperson Morgan Ortagus said the US would do what it could to strengthen the relationship among the three countries.