ABSTRACT : We investigated regional issues using the Analytic Hierarchy Process method, and compared resident consciousness of regional promotion between RISHIRI (Rishiri-town and Rishirifuji-town) and REBUN (Rebun-town) islands, Hokkaido, Japan. In past studies, regional problems have been similar on these islands, so, we set a hierarchy figure with three levels of problem classifications and a substitute plan. Based on this figure, we made a pair comparison list and carried out a survey using a questionnaire. We determined that “local industry promotion” and “reliable life promotion” were common on both islands, but they differed in their relative importance. “Local industry promotion” was more important at Rishiri-town and Rishirifuji-town, but, “reliable life promotion” was more important at Rebun-town. The islands zone are located only 20km apart, and thus are considered to share similar culture, so it is guessed that the geographical and historical characteristics of each town caused the difference of the priority for the regional promotion.

We guess that when drafting and performing a regional promotion plan, it is necessary to grasp a historical, geographic and economic background as well as resident consciousness. It is an important to find and grasp “the strengths of each area”.

ABSTRACT：In this study, the possibility of removal of fine particles from water by hydroxide precipitation with increasing pH were investigated for lake or an enclosed sea area. From the field experiment results, it was found that the steel slag could be use as the alkaline agent. The pH value of water through the steel slag layer was increased from 8~9 to 10~10.5. The removal rate of SS increased with increasing pH of solution. Especially, removal rate of SS reached 100 % on the range of pH > 10. That of COD also increased with increasing pH of solution. Therefore, increasing pH of solution, it is possible to remove the fine particles (less than 5μm) from lake water or seawater.

ABSTRACT : Marine litter has become a problem anywhere in japan recently. This problem has been studied variously, but the research which is based on “public interest studies approach” which makes use of the theories of public interest studies as an analytical framework is little or no. This research is based on “public interest studies approach”. This research takes hold of the present situation of marine litter, moreover, analyzes “public interest studies approach” which is an analytical framework in this research and public interest studies which is the base of this approach. This research analyzes the public interest of “Operation Clean up Tobishima Island” which is one of measures against marine litter in Tobishima Island. Firstly, this research analyzes it making use of knowledge or theories about public interest of public interest studies as an analytical framework. Secondly, This research analyzes it making use of “public interest principle･economic principle approach” which falls into “public interest studies approach” as an analytical framework. As a result, the public interest of “Operation Clean up Tobishima Island” is observed.

ABSTRACT : Various efforts for the regional activation in the Amagasaki Canal have been pursued. However, according to the bias like dangerous and polluted place, people scarcely approach there psychologically. In this study, we took questionary investigation about ripple effect for children and parents on environmental education using experiment plant for water environment restoration in the Amagasaki Canal. As a result, the most things the children remember about water color and muddy soil and natural life forms. About 60% of the parents who have not attraction to the Amagasaki Canal take on attraction to there due to advices for children.

ABSTRACT : Flood hazard measures of residents along bay coasts of Tokyo and Ise were surveyed by the method of questionnaire (dropping off a questionnaire at household and later picking up a questionnaire by mail), and the results of questionnaire were classified by using a cluster analysis in this paper. Consequently, a characteristic and a subject on flood hazard measures of residents along bay coasts of Tokyo and Ise were considered in accordance with the results of questionnaire.

ABSTRACT：Fishing port facilities are the main coastal structure in fishing village and form a large number of existing stocks for which introduction of life-cycle management such as durability upgrading and life extension measures is needed. To this end, degradation level of the facilities must be known and the degradation diagnosis must take into account the particularity of each facility. Hence, the scatter in diagnosis results by operator and inefficiency of diagnosis procedure should be eliminated by clear evaluation criteria and labor saving diagnosis procedure. This study aims at establishing a degradation index and simplification of diagnosis procedure applicable to the fishing port facilities. Applicability of impact-echo method using surface P-wave to the degradation diagnosis of fishing port facilities was investigated for the first time in terms of effects of moisture content and expansive cracks of concrete. Finally, accuracy and applicable range of the diagnosis method were studied using existing fishing port facilities.