Reproduction by biological organisms is like interest being generated by savings. There is a need to aim for sustainable use of biological resources by clarifying scientifically that most of the bounties of forests, homelands, and sea brought about by the Kuroshio current are in the form of biological resources, consisting of the total resource amount (principal), the rate of reproduction (interest rate), and the amount of consumable resources (interest). Promotion of interdisciplinary research that fuses the physical and social sciences, based on hard data, is indispensable.

The diverse ecosystems to be found in the area of coral reefs, including mangrove forests, sandy beaches, and sea grass beds, present a variety of vistas that are intimately connected through the animal migration and biogeochemical cycle, resulting in a high level of biological diversity. It is hoped that coastal zone management based on this interconnectivity can be implemented.

The inconsistencies of maritime transport and port operation development in Japan, if rational, could be accepted. However, if Japan aspires to be a strong maritime state, we must discover the DNA of maritime culture that emphasizes a global outlook and then build a unique social infrastructure responsive to the times.