ABSTRACT ： This study aims to examine current status and significance of the use adjustment rules between use subjects that consist of a part of the use and management rule in coastal zone where rising multi use through a case study of Onna Village, Okinawa Prefecture. In this village, multi-use of coastal zone progressed in the background of development of marine resort industry, therefore various conflicts occurred. Coastal zone use adjustment council was organized that composed of the stakeholders. The council made some rules in order to solve these conflicts, and made a system of regional development. As a result, the new style of the use and management of coastal zone as "tight local commons" was formed on the assumption globalization and change of coastal resources character.

ABSTRACT : Source and drift of marine litter in Seto Inland Sea were investigated by making use of disposable lighter as an indicator item. The lighter has a characteristic that the discharged location can distinguish by information printed on the surface of tank. The collected sites were 264 beaches in Seto Inland Sea. The total number of lighters collected in the past four years (2004, 2006-2008) was 5,474. Of them, the discharged locations of 302 lighters were in Seto Inland Sea. When the total amount of flow out of each prefecture was 1, the drift rate to the own region, the inflow rate from the other regions and the outflow rate to the other regions were calculated. The regions of tendency to inflow (inflow rate > drift rate) were Hyogo and Yamaguchi prefecture. The regions of tendency to flow out (outflow rate > drift rate) were Osaka (include Kyoto and Nara), Okayama, Hiroshima, Fukuoka and Oita prefecture. Kagawa prefecture had both tendency. The discharged sources of these lighters extend to not only coastal cities, but also inland and mountain cities along the river. A part of ocean drifters have passed through the straits and have drifted in Osaka Bay, Iyo Nada and Suo Nada.

ABSTRACT：In this study, the iron and steel slag coated with iron hydroxide was investigated for adsorbing phosphate from seawater by field experiments on an enclosed sea area. From the results of field experiments, it was found that the ability for phosphate adsorption was mostly influenced by phosphate concentration and pH of seawater. The adsorbed amount of phosphate also decreased with increasing pH and decreasing phosphate concentration of seawater. Particularly, as the phosphate concentration of seawater was less than 0.01 mg/L and pH of seawater was more than 8, the adsorbed phosphate was desorbed from the iron and steel slag coated with iron hydroxide. The seawater quality on the field sea area was changed by hydrographic conditions.

ABSTRACT : Land condition maps are recently published as vector data format by Geographical Survey Institute, and then it is easy to analyses combing variable national land data using GIS. In this study, the authors analyze the relationship between landform classification and disaster damages to combine the vector data of land condition maps and the information of earthquake damage distribution using GIS, especially case of the 1944 Tou-Nankai Earthquake in Tokai District. On terrace or fluvial fan, housing damages are relatively small. And on valley plain or flood plain, coastal plain or delta and natural levee, housing damages are relatively large. As the results of GIS analysis using boring data, there are heavy building damages on the soft mud deposited area. These results show that it is important to consider the landform evolution.

ABSTRACT: Many of the islands in Japan have suffered from depopulation and population ageing and have problems about transportation in these islands. Especially, securing mobility for elderly people has been one of big problems of transportation in these islands. However, they don't have fundamental data to analyze behavior of the people in the islands and to plan measures for these problems.

In this study, a person trip survey were carried out to the people in the Osaki-Kamijima Island, which is located in the middle of the Seto Inland Sea, and the data obtained from this survey are analyzed to reveal some characteristics of travel behavior of the people, in particular elderly people. As the results from the analyses, the number of trips, travel purpose, transportation used by the people and so on were revealed.

ABSTRACT: The several researches and developments on disposal of waste FRP fishing vessels have been carried out since around 1980's in Japan. Unfortunately, There has been no economically practical method. The main reason is the difficulty of disposal due to their superior material properties. Therefore, The most common disposal system of waste FRP fishing vessels is dismantlement, incineration and reclamation. The suitable lands for reclamation have been exhausted in coastal areas. The immediate establishment of disposal system for waste FRP fishing vessels is an urgent social demand. On the construction planning of disposal plant of the waste FRP fishing vessels, it is most important to clarify the appearance trend of scrapped FRP fishing vessels. The indicators to be investigated are the lifetime and the operating period of FRP fishing vessels. In this paper, the prediction of the lifetime and the operating period of FRP fishing vessel have been carried out on the basis of the statistic table of fishing vessels and the statistic table of fishing vessel insurance. The lifetime of FRP fishing vessel is estimated more than 62 years. The operating period of FRP fishing vessel is estimated about 24 years, and is defined as the median lifetime.

ABSTRACT：It induces to the position while in real time detecting the position of the fishing bank block, and the system that installs it in high accuracy is developed.and it proved in the Tajima offing.

It was able to secure within ±30m by the type it was possible to do management value in all the result, the fishing bank blocks.