Under the present situation in which flag of convenience (FOC) ships account for more than half of the world's merchant marine fleet, advanced maritime powers are introducing the second registry system that is comparable to the FOC ships, it is almost impossible for Japanese shipping companies, which are exposed to the free competition in the world market, to build new ships of Japanese registry. It is hoped that Japan can carry out a positive reformation of the system, which is an introduction of the second registry system, under which shipping companies, which are private companies, can be motivated to build new ships of Japanese registry.

The ship "Sant Juan Bautista," the Keicho Diplomatic Mission Ship, had actually crossed the Pacific Ocean twice 250 years before the year determined by a widely-accepted theory in which the first Japanese ship is said to have crossed the Pacific Ocean, the "Kanrin-maru" in the first year of Manen (1860). The Sant Juan Bautista Museum has an exhibition of the "Sant Juan Bautista," which was reconstructed as a successful achievement of Japan's wooden ship manufacturing technology, and efforts are devoted to transmit the wooden sailing ship culture and shipwright techniques, which are vanishing these days.

If a new type of nuclear power plant (ADSR), which has no risk of accident, unlike the existing nuclear power plants, and can resolve the waste problem, could be constructed on a mega-float, it allows us to have a doubly or triply safe nuclear power plant float.