Northeast Asian economic integration and regional dimension in the community formed for discussion at the beginning of the what he has to wait until all the members of the joint between consensus and shared values should be. Also at the same time to solve various conflicts caused by ideological enemies to establish cooperative relations with mutual trust relationship with the national consensus that the recovery of love. Northeast Asia in particular, in order to achieve economic integration in the geographical proximity between the members of the gazette troubleshooting it is also one of those important challenges, The tentative name for this study, pay attention to the issue of the Korea-Japan undersea tunnel construction, transport links and integration in Northeast Asia dimensional compound, the building of railway passengers will no means. However, the Korea-Japan undersea tunnel construction of the parties to the latter aspect is that the planning at the same time, challenging aspects of existence. First, the two countries will discuss concrete therefore, prior to a complex historical background and political and economic interests to overcome to obtain understanding from the people we need to be