The process of strengthening political and economic importance of the Asia-Pacific region within the framework of the existing system of international relations is accompanied by the growing competition between its key players. A number of countries differently treats the rules of international Maritime law, seeking to provide the priority level of their own security - not only military but the mineral and even environmental. Attempts of some States to extend its sovereignty and jurisdiction over islands, sea waters, their living and mineral resources of the seabed and its subsoil had faced with opposition by the others eager to prevent the restriction of their rights and freedoms enshrined in the UN Convention on the Law of the Sea (1982). An analysis of how justified are certain claims and what is their role in strengthening regional conflicts becomes the aim of this article.