During a press conference on Tuesday, Japanese Education Minister Hakubun Shimomura said Tokyo will revise its teaching manuals for middle and high schools, since it's important for students to have a correct sense of Japanese territory.
The minister did not elaborate on the details of the revision, but according to Japanese media, the new teaching guidelines will claim that Dokdo is illegally occupied by Korea.
These manuals are often used as reference materials to certify textbooks, which means more Japanese textbooks could state incorrect territorial facts down the road.
Seoul's foreign ministry slammed the move, saying Japan must drop its unjustified claims at once.
"Japan must immediately withdraw these unjustified claims. Let me reiterate that doing this would lay the path for friendlier ties between Korea and Japan."
Dokdo has long been a thorn in Seoul-Tokyo relations, with Japan continuously laying claim to the islets in school textbooks and government reports.
"In its latest effort to counter Japan's territorial claims to Dokdo, the South Korean government released an online video clip on New Year's Day promoting its sovereignty and said that the clip will soon be available in English and also in Japanese.
Hwang Sung-hee, Arirang News."