President Lee Myung-bak visited the easternmost islets of Dokdo on Friday. The watershed visit, the first by a president to the contentious islets at the heart of a territorial dispute with Japan, stunned and angered the Tokyo government, which warned of serious repercussions on Korea-Japan relations. There is nothing wrong about the top state executive visiting frontier territory as the head of command in national defense. Tokyo, however, is almost out of its mind over the incident. It reportedly is planning recall the Japanese ambassador in Seoul and protest to the South Korean ambassador in Tokyo. Japanese media highlighted Lee’s visit as a serious threat to bilateral relations.