South Korea's foreign ministry came under fire on Friday after it was found that some of its diplomatic cables and online publications failed to use "East Sea" to identify the waters separating the Korean Peninsula and Japan.
The gaffes come as South Korea is calling for the international community to simultaneously use both "East Sea" and "Sea of Japan"
to identify the body of water amid a long-running tussle between Seoul and Tokyo over the name.
However, some diplomatic cables and documents posted on Web sites of the foreign ministry and its Japanese mission only used the "Sea of Japan" name, according to an investigation by Yonhap News Agency.
For instance, a cable dated in 1980 and titled "JAW-10672"
cited unconfirmed information that South Korea "dumped low-level radioactive waste in the Sea of Japan." Yonhap obtained the cable under a law that allows citizens to make requests for public records.
Also, the Web site of the Korean Embassy in Tokyo showed some documents that only used the "Sea of Japan" name.
Among public documents posted on the Web site of the Korean consulate general in Japan's Niigata prefecture, there is a total of 227 cases where officials failed to simultaneously use the two names.
An official at Seoul's foreign ministry said the gaffes happened because such documents were the results of word-for-word translations of Japanese media reports.
Kim Ho-dong, a professor at South Korea's Yeungnam University, refuted the claim, saying "Even though such documents cited Japanese media reports, they should be posted on the Web site of our government agencies after correcting it to the East Sea."
South Korea is stepping up its diplomatic efforts for the 70-nation International Hydrographic Organization (IHO) to use both names concurrently to describe the body of water at the IHO's general assembly meeting in April.
South Korea said use of "Sea of Japan" was established unfairly during Japan's 1910-45 colonial rule, arguing the Japanese appellation is a vestige of Tokyo's imperialistic past that should be changed.
Since officially naming the body of water the East Sea in 1992, South Korea has lobbied the international community to simultaneously use both names.