I think it is good that both the Korean and Japanese governments are trying to improve relations by not making Liancourt Rocks (Dokdo/Takeshima) an issue, but I do not understand why the Japanese government would not want Japanese students to know the facts surrounding the dispute?
Teaching about the Liancourt Rocks dispute and not making it a diplomatic issue are two separate things. Japanese educators should be allowed to do their job while Japanese diplomats do theirs.
The following is my translation of a Korean article, HERE, from Korea's "Maeil Business" newspaper:
"'Dokdo' Contents Removed from Japanese Educational Guidelines"
It has been revealed that the Japanese Ministry of Education, Culture, Sports, Science and Technology removed mention of Japanese sovereignty over Dokdo (Takeshima) and Senkaku (尖閣) Islands in a February amendment to its Educational Guidelines. This measure was adopted by Prime Minister Yasuo Fukuda, who places importance on Asian diplomancy, to avoid friction with Korea and China.
However, during a meeting of the Education Committee of the House of Representatives, which convenced on the 21st, Democratic Party Diet Representative Maki Yoshio said, "Takeshima (Dokdo) and Senkaku must be mentioned in the guidelines," and "showing concern for and compromising with neighboring countries are separate issues."