Maritime Sciences is the interdisciplinary integration of various academic fields related to maritime affairs. Its objective is to understand many global issues involved in maritime activities on ships and on the open seas, including the issues of transportation, communication, information, energy and environmental protection.

The goal of the Graduate School of Maritime Sciences is to employ a scientific approach in a highly advanced manner that combines both natural and social sciences. Given this objective, the foundation that is built from the basic knowledge and sense of purpose acquired in undergraduate programs is critical. The Graduate School offers highly specialized instruction and guidance on research activities in its Master's and Doctoral Programs to foster creative researchers, educators, and highly skilled professionals who possess diverse global perspectives as well as problem-solving abilities. Students must select one of the following divisions:

1. The Division of Global Transportation Sciences provides education and research programs on ship operation, management technology, logistics management, and information analysis in order to multilaterally construct the optimal transportation and logistics system that combines all modes of transportation especially with a focus on marine transport. The mission of this division is to contribute to construct advanced transport systems that would support the foundation of international logistics, while reacting to the globalization of world economy.
2. The Division of Ocean Safety Systems Science provides education and research programs which cover the fields of Water Environment, Meteorology, Geology, Maritime Safety, Radiations and Particle Beam Science, Material and Analytical Chemistry, and Mathematics, with paying the special attentions on the preservation of global and marine environment and safety development and uses of the oceans, in order to achieve the sustainable development of the human society.
3. The Division of Marine Engineering provides education and research programs to foster highly-skilled engineers and researchers who are capable of developing, designing, and managing ocean related systems, based on the foundations of engineering. The mission of this division is to pioneer new disciplines and technologies that would contribute to develop marine and ship industries.