For the construction of infrastructure in developing countries, technical standards play an important role to secure the quality of infrastructure. For port facilities in Vietnam, the quality of construction works was managed under old design and construction standards, and the problem is that the standards do not satisfy the requirements of new construction technology. Therefore, new design and construction standards for port facilities in Vietnam have been developed in cooperation with Japan to meet Vietnamese present conditions.

 This paper presents the basic concept of promoting the Japanese technical standards for port facilities overseas, and explains the approach to develop the construction standards for port facilities in Vietnam based on Japanese standards. In addition, it describes the characteristics of port construction standards in Japan and Vietnam, and discusses the basic editing policies of developing new standards and the main features of the new standards. It also presents the findings through developing the new standards.

 The University of the Ryukyus conducted an empirical experiment on new crack image analysis technology (T Corporation) which is one of the development technologies of the Cross-ministerial Strategic Innovation Promotion Program (SIP) infrastructure maintenance, renovation and management technology to concrete bridges of remote island with many restrictions on inspection, and obtained results were good agreement with visual inspection results.

 The result was evaluated by the bridge manager, and this technology was used for the part of the inspection service of a concrete bridge. The approach in the University of the Ryukyus for the empirical experiment of this technology is one implementation model which led the new technology to the regional implementation.

 In this paper, the background and the consideration of success factors that led to the regional implementation of this technology from the empirical experiment are shown. Moreover, cost merit, efficiency and sophistication of this technology are examined.

 Also, new 3D visualization technology for crack analysis was developed through the regional implementation.

 In order to evaluate soundness of the bridge pier by microtremor monitoring, we propose a method to evaluate the soundness of the piers against scouring with natural frequency and damping ratio, aquired from the Fourier amplitude ratio of the estimated ground vibration and the vibration on the piers. Since it is necessary for practical use to grasp the influence of disturbance such as high water level and strong wind, we investigated the microtremor monitoring data under typhoon passing. As a result, we have found that we can estimate the ground vibration properly during high water level, however the estimation accuracy decreases when the wind is strong, which may makes it difficult to obtain the correct natural frequency and the damping ratio. Based on these results, we have reviewed the points to be paid attention to evaluate the soundness of the bridge piers against scouring through monitoring microtremor.

 In Japanese water supply projects, aging pipelines and other facilities require complete overhauls, while the income from a declining population is forecasted to decrease, threatening the sustainability of water supply services. As a solution to this problem, public-private partnerships, especially the concession method, is receiving more attention. At present, there are only cases where the maintenance and renewal of pipelines, which accounts for the majority of water supply facilities, is excluded from the business scope of private enterprises, and its effect is limited. In this research, in order to consider how to provide incentives to private enterprises in the concession method, we formulate the effect of contract extensions and additional remuneration according to business performance, and analyze performance data from Kashiwa city’s water supply project. As a result, the model suggests that it is appropriate to extend contracts that include pipeline maintenance and renewal according to business performance.

 Based on the incomplete contracting theories Okamoto et al. (2003) yields a conclusion that BOT (Build Operate Transfer).models deliver better VFM than BTO (Build Transfer Operate) models from the viewpoint of cost reduction. Iossa and Martimont (2012) suggests that such excellent performance of BOT should be observed in a more mature phase, where sufficient past evidence is available to inform parties of what may arise during operations. On the other hand, there are some quantitative analysis studies on the PFI contracts in Japan which include those at the initial phase. The studies analyzed that the contractual models didn't affect VFM and that VFM of the analyzed contracts were delivered by reduction of construction cost according to competition. In this paper we analyzed the last ten years PFI contracts in Japan and compared the results with those of the above previous studies taking into account the suggestions of the mentioned theoretical studies.