This study takes close look at establishing of cooperation system around the coast of northeast and how it works in institutional implementation of the continental shelf of Korea-Japan joint development zone agreement. East China Sea that the claims of countries are confronted about the boundary of the continental shelf is the hot potatoes of the marine regime. As all these problems like continental shelf, boundary delimitation of exclusive economic zone, sovereignty issue of Chinese-Japanese around Senkaku/Diàoyúdo and Ieodo problem between Korea and Japan are entangled complexly, it is realistic to seek solutions utilizing multilateral framework rather than running a channel of conversation bilaterally. However, since Chinese-Japanese, Korean-Japanese and Korean-Chinese agreements about the fishing problem is connected each other respectively, waters that are not bounded are regulated and managing as the joint regulated waters. Even though there is a criticism for approaching the way of Danaagae, Northeast Asia offshore cooperation can be evaluated as the practical solution so as to secure fishery resources and protect the safety and life of fishermen and not to be an issue the problems that are difficult to solve.
Korean-Japanese governments did not demarcate the boundary of the continentalshelf of the East China Sea and it was the continental shelf of Korea and Japan that led to political consensus by ways of joint management and development.
In this agreement, continental shelf boundary of the sea area that claims both sides deal with boundary delimitation the ways of Danaagae so joint waters are defined in the Donghae and joint development is regulated in the continental shelf of East China Sea. In other words, the two countries, Korea and Japan, put the first button in order to fulfill institutional settlement of joint developmental cooperation regime about the continental shelf.