The U.S. State Department has explained that "Sea of Japan" is the official name that Washington uses to describe the body of water between the Korean Peninsula and Japan.
South Korea's Yonhap News Agency reports. that an official from the State Department responded to a written inquiry, saying the name complies with the U.S. Board on Geographical Naming.
The official also suggested that Seoul and Tokyo reach an agreement on the naming
Following U.S. President Trump's mentioning of the "Sea of Japan" while meeting with American troops in Japan, the South Korean government reiterated its stance that "East Sea" must be jointly used.