During the year of 2012,seas of East Asia witnessed much disturbance.Territorial disputes on Diaoyu Islands between China and Japan kept escalating,with tension building up to a high point.Japan was also in simmering disagreements with the ROK over islands which Seoul calls Dokdo and Tokyo calls Takeshima,the relation between the two hasing dropped to the lowest since their joint launch of World Cup 2002.Compared with marine rights disputes between China and Japan and that between the ROK and Japan,the intensity index in case of marine rights disagreements between China and the ROK is not very high.However,to some degree,it did bring negative influence upon China-ROK relationship.Since United Nations Convention on the Law of the Sea issued in 1982 went into effect,in China and the ROK,marine rights disputes have emerged and become increasingly prominent.In recent years,conflicts focus mainly on fishing disputes and Suyan Islet issue.In 2012,these problems once again stirred disturbance.New changes and development will possibly become a major variable that may affect normal development of the two nations' relationship.Thus the thesis holds that sustained follow-up study and analysis is worth being conducted over these issues. <<