ABSTRACT：Sources of marine litter on the Japanese and Korean coasts were compared by making use of an indicator item. The disposable lighter was chosen as an indicator, because the discharge area and location can be distinguished by characters printed on the surface of tank. The collected sites were 105 beaches on the Japanese coasts of East Asia Sea and Sea of Japan, and 3 beaches on the southern coast of Korean Peninsula. The number of lighters collected for two years were 6,880. The lighters that flowed out from China and Korea were recognized at the west coast of Tsugaru (Aomori prefecture) and the coast of Rumoi (northwest Hokkaido). Japanese and Korean coasts were affected by marine litter from China, but influence of outflow from the own country was strongest in the both coasts. It was suggested by this method that it is possible to monitor the source of outflow, the distribution of influence area and the annual change of marine litter on the coast of both countries.

ABSTRACT：This paper describes results of field surveys and analyses for coastal damages, occurred in Muroto city, due to the Typhoon 0423 (TOKAGE). In Muroto city, concrete parapets of a seawall were broken by a large run-up wave and plunged into the houses, resulting in three persons・death. In this study, wave prediction system was constructed to estimate typhoon-generated waves. Concerning with wave characteristics in front of the damaged seawall, wave run-up and overtopping were analyzed. In particular, analytical results of run-up agreed well with the witness information by residents.

ABSTRACT：The necessity of mODal shift has been emphasized to solve the various problems caused by trucktransportation such as air pollution and future lack of workers by declining birthrate. It is said that ferry lines can play aprincipal role in mODal shift policy on account of their easy intermODal transportation services. However, ferry lines in theSeto Inland Sea have been put in very difficult situation lately because of opening the Honshu-Shikoku ConnectionBridges and arguments about reduction in toll of the expressways and the Honshu-Shikoku Connection Bridges.

The purpose of this paper is to analyze a mODal shift by using ferry lines of the cargos which is transported bytrucks between Shikoku and other regions. From this result, it is indicated that lot-size is an important route choice factorto truck transportation cargo and making lot-size larger promotes mODal shift by using ferry lines.

ABSTRACT：The research aims to verify the physiological and psychological effects to visitors by staying in small islands, Amamiohshima. We actually executed the experience tour and clarified changes of visitors' feelings and Health Related Quality of Life on staying in the solitary island. We used Profile of Mood State and 36-Item Health Survey as an evaluation index and compared scores of daily life, before and after the tour. In addition, hearing research was investigated, being referred to considering the psychological effects. Consequently, students seemed to regain mental health by the stay though they felt physical tiredness. Especially, on the person who felt stress in daily life, the change appeared remarkably. It seems to be that they had much effects from environment of the island, especially, spending on the beach, having unusual experiences and communication with people. It can be said that effects such as recreation and improvement of psychological health by staying in Amamiohshima was proved.

ABSTRACT : This research deals with spatial influence over the fisheries off Boso peninsula, marine environment and the location of fishing ports. The purpose of this study is to get fundamental data to revive the promising creative fishing banks and seized on systematically fisheries by the standpoint of general situation. In the first place, make clear about characteristics of fisheries by concretely statistical information and estimate spatial influence of fishing ports locating by the numerical value. As a result, many fishing ports near fisheries are valid for landings and classifications, but some have to be improved on.

ABSTRACT : Mass mortality of aquatic organisms occurred around the western coast in May 2003, in the Yokohama coastal area, Tokyo Bay. An implementation of “workshop” approach to reveal the mechanism of the mass mortality was introduced. A scenario of a chain reaction from a red-tide occurrence to the mass mortality of organisms had been tested using numerical computation. As a result, a possibility of the anoxic water, which was caused by the decomposition of large amount of Mesodinium rubrum transferred from Tokyo Harbor, leading to the mass mortality of aquatic organisms, was presented.

ABSTRACT : An impact response flow is the technique of arranging the influence course which structure installation has on a living thing or habitation environment. In this paper, in order to determine the rational monitoring plan of the influence of construction for the threatened species OKINAWAYAWARAGANI (Elamenopsis okinawaensis Nakasone et Takeda, 1994) with little information, the impact response flow was utilized. This flow made it possible to setting up a monitoring plan suitable for the species even in ocean space. Furthermore, the monitoring result was made to feed back to the monitoring plan.

ABSTRACT : “Tsushima Conference on the Issue of Marine litter on Islands Beaches” was convened at Tsushima City of Nagasaki Prefecture, October 2004. In this conference, the problems of marine litter with various sources and causes were argued about the following matters as one of the ever-increasing serious global environmental problems. The increased costs of recovery and disposal at the coastal local governments, the need of control and measurement of the litter outflow from rivers of our country as well as from coasts of East Asian countries, and the necessity and effectiveness of making an effort in collaboration with different actors. In addition, a need of a monitoring program as a tool to solve the problems was also discussed. In this report, it organized the information on the monitoring methods of marine litter, and the future of the marine litter’s monitoring was discussed by making use of the idea of “open source” and “platform”.

ABSTRACT : We have participated for several years in the process of public consensus related to public works such as river, port, fishing port engineering as well as shore protection works and experienced the reality of the public consensus. In these processes, some issues from the practical point have became clear. These issues were investigated in detail and the improvement method was clarified. A new procedure to solve these issues was proposed.