A tub-turned boat even appeared in the animated movie, "Spirited Away." At present, communities that fish with the use of tub-turned boats are extremely limited in Japan, and on Sado Island, the technique has only been handed down at Ogi Point, the extreme southern tip of the island. Fishing with the use of tub-turned boats originated from the ancient wisdom of fishing in narrow coves that were formed by earthquakes, but it is slowly disappearing because of the aging of the population. I wonder how we should hand it down to the children who will shoulder the island's future.

The activation of island co-governance is a royal road to the fulfillment of a strategy for a maritime nation. However, because local public systems for island co-governance are structurally in decline, a strategy to raise the standard through cooperation and participation inside and outside of islands, under livelihood principle and practice with islanders playing a central role, should be being pursued nationally. Through empowerment and the adjustment of power formation inside and outside of islands, the view of the ocean will be returned and revitalized to the people. Their views of island life and of lifenomic civilization along shore and see will be raised to the vanguard.

The number of people using sea routes to and from isolated islands has been recently declining due to depopulation and the progression of aging, so ship operators to and from the islands are facing difficult operational conditions. However, because of the particularity of the isolated islands where there is no other means of transportation other than by ship, it is necessary to ensure a minimum means of transportation for island life and measures to do so are a major issue. Furthermore, there is also a demand to steadily proceed with the conversion from ships to ferries, and the provision of high-speed transportation and barrier-free features in response to a change in the need and diversification of transportation.