The rapid boat line has been operated through the Osaki Kamijima Island, which is located in the middle of the Seto-Inland Sea, to the mainland. Its service had once been decided to stop because of the decrease in its users but now is maintained, receiving the subsidy from the local government. Although validity of this subsidy or maintaining its service has to be assessed, we don't have fundamental data in order to assess it, for example its actual use condition and attitude of the islanders toward the line. Then, in this study, we try to reveal actual use condition of the rapid boat line and attitude of the islanders toward this line on the basis of questionnaire surveys we carried out.
