Internet has become the most efficient method in information dissemination, collaboration and interaction connecting diversity of people, places, ideas and cultures all around the world. With new communication and information technology, Internet has become a pragmatic way for NGOs to share their interests worldwide. Although NGOs have been utilizing the internet, the power of internet-activism is underestimated. Thus, this paper studies Internet-activism as the new method for NGOs to work in terms of territorial disputes. It specifically studies South Korea and Japan’s territorial disputes over Dokdo and Sea of Japan/East Sea that have been causing heated contention over a long time. It studies NGO’s different methods in raising awareness of this issue through a Korean cyber organization called VANK, Voluntary Agency Network of Korea. The purpose of this study is to prove that Internet-activism is an efficient and powerful method for NGOs.