While Japan now has a Basic Act on Ocean Policy and many are calling it a Maritime State, as long as we limit our debates to neighboring seas we've not gone beyond our island mentality. Last year, after looking into China's marine science and technological capabilities, I felt keenly that a comprehensive and systematic survey should be undertaken. In this article, I would like to give an overview of the state of marine science and technology in China and also make a proposal regarding Japan's ocean policy.