This study aims to clarify the key factors for promoting the urban development projects in Toyohashi during 1907-1914, focusing on the strategic plan through public-private collaboration. By analyzing the process of three projects: the construction of road, the relocation of a red-light district and the permission of the licence to build an electric tramway, the followings are found out. Firstly, Toyohashi city government relocated a red-light district from city centers to Azumada in the eastern suburbs of Toyohashi in the prospect of large profits that came from the purchase and lease of land. As a result of this, one can see that Toyohashi city intended to cover the road construction cost for its own incomes in terms of the urban management. Secondly, some directors of Toyohashi electric Co., Ltd. applied for the licence to build Toyohashi electric tramway, which connected Toyohashi station, city centers and Azumada red-light. Furthermore, the route of Toyohashi electric tramway extending to the south of the city seemingly targeted soldiers. At the time when the application was granted regardless of the high construction cost, some out-of-city businessmen already took a capital participation in Toyohashi electric Co., Ltd. The directors of Toyohashi electric Co., Ltd. also involved in the relocation of a red-light district. The above facts suggest that Toyohashi electric Co., Ltd. planned a red-light district and an electric tramway in order to create power demand. Lastly, we have concluded that the key factors for promoting three projects: road, a red-light district and an electric tramway must be the common strategy in which Toyohashi with a small capitalization developed as a modern city by the public and private sectors working in coordination with each other.

 This study examined the “Nanki Tokugawa-Shi”, which summarizes the records of the Kishu Clan in the Edo Period. Based on descriptions contained in the “Nanki Tokugawa-Shi”, 45 articles on social infrastructure maintenance were extracted. These 45 articles examined 15 social infrastructure developments. The results showed that there are numerous descriptions of developments related to new rice fields. In addition, many articles were related to the excavation of new irrigation canals, and irrigation facilities. Most of the records were related to floods and the extent of damage caused. Furthermore, there were numerous articles on the remarkable achievements of Saizo Ohata, including the construction of a long canal in the Kishu Domain. However, there were very few articles in the “Nanki Tokugawa-Shi” on Yasobe Tamenaga Izawa who was appointed by the Kishu Clan to the Edo Shogunate.

 This paper is showed the changes of Japanese railway ballast quality standards up to now. First, standardization in the Meiji 40's was given in the regulations of maintenance and construction, until then ballast quality was differed from each line. Next, in the early Showa era, the particle size was quantitatively determined and shape and hardness was qualitatively determined. In the mid-20s of the Showa era, the physical properties were quantitatively standardized with the test method. In the Showa 50 standardization of the ballast quality standard was made a connection with the track regulations. Furthermore, in the Showa 58 year, the previous standard was revised for the purpose of strengthening quality control. It can be said that this standard of the ballast quality standards follows the present. We understand the background and problems of ballast quality standards are essential for securing high-quality ballasts in the future.

 This paper outlines the organizations that played a leading role in the decision-making of Japanese port policy in the early Showa period, the contents of deliberation, and their historical significance. It is a part of research to clarify the details and role of port policy in Japan in the prewar period and is an attempt to elucidate their significance.

 The analysis in this paper is of an organization called the Civil Engineering Conference established in prewar Japan. The organization was established in 1933 for the purpose of investigating and deliberating matters related to civil engineering, such as roads, rivers and harbors. Within the civil engineering meeting, a port subcommittee was set up as a department to deliberate on important issues related to ports in particular. After that, all port improvement works carried out before Japan was defeated in World War II were carried out after deliberation within the subcommittee. There, each plan that forms the current socio-economic foundation of Japan was deliberated and formulated.

 This study focused on the reinforced concrete structures of the Tokaido Shinkansen and the Sanyo Shinkansen to clarify the effects of construction characteristics on the deterioration after long-term service. By using construction journals, construction characteristics based on the construction management system and the materials and technologies were clarified. In addition, for the Tokaido Shinkansen, compared with these characteristics and the survey results of real structures, it was confirmed that good quality concrete structures were constructed. Furthermore, by comparing the results with those of the Sanyo Shinkansen, it was confirmed that the construction characteristics, water to cement ratio and chloride ion content, affected the deterioration of the concrete structures after long-term service.

 This paper describes the trend (workplace before and after the Imperial Capital Reconstruction) and characteristics of technical staff (engineers and assistant engineers) of government (Ministry of Interior Reconstruction Bureau, Tokyo City and Yokohama City) who participated the Imperial Capital Reconstruction after Great Kanto Earthquake. As a result, It became clear by the analysis of the origin place work of the member of technical staff of each government office that the member of administrative technical staff were recruited with precedence to the national government. The trend of technical staff which Tokyo and Yokohama City continued the organization and Ministry of Interior Reconstruction Bureau abolished the organization had greatly differed. As a characteristics of technical staff, There are a lot of young technical staff in thirties from twenties. Assistant engineers from old technical college and industrial school supported the project under the management of the engineers from Imperial universities. It was technical staff to take charge of land readjustment that was most number of the technical staff from prefectures.

 This study aims to consider the social role of riverside land by defining the relationship between land-use changes in farmland in the riverside land of the Arakawa River, as well as its domestic and international socio-political influence. This became the first study that shows the changes in the social role of riverside land and land-use as a farmland in the riverside land are influenced by domestically and internationally social and political backgrounds. To begin with, the transition of land-use in farmland in the three municipalities in the Arakawa basin, from the 1880s to the 2000s, was researched using GIS. Next, the factors of land-use change in farmland in the target areas were clarified through a literature survey. Based on this knowledge, the relationships among the domestically and internationally social and political backgrounds, as well as the land-use changes were examined. It revealed that the cultivation of mulberry developed in the riverside land of Arakawa River, it subsequently spread to neighboring areas as the national status of the sericulture industry grew. Furthermore, the study suggested that this development was influenced by the agricultural administration during the industrial development era and under the wartime regime. Additionally, even following the decline of the domestic sericulture industry after the 1990s, the cultivation of mulberry in this area was maintained, until silk factories closed. Ultimately, this study shows that the changes of the social role of riverside land and land-use of the riverside land, as an agricultural space, changes depending on the domestic and international social and political situation.

 This study focuses on three simultaneous projects in the latter half of the Meiji era: the Osaka Harbor Construction and the Yodo River Improvement, and the Town Planning of the expanded Osaka City. These projects were planned by Koi Furuichi, Tadao Okino, and Hannroku Yamaguchi, all of whom were studying abroad at École Centrale des Arts et Manufactures in Paris in 1876-1879. Although the relevance among these projects and figures had been pointed out, it had not been recognized as an integrated business that shared one purpose since each was a large-scale business. This study shows the fact that these three huge construction projects were carried out holding a concept that brand new industrial system of the modern port city should be constructed as a whole, with an understanding of ÉCAM’s management perspective. So that, infrastructure to form industrial environment learned from study abroad was dynamically planned with complementary works specially on the waterfront zones with efficient cargo shipping system which were on the boundaries of each region, through from harbor construction and to town planning.

 This report clarifies the career and urban planning works of Tamotsu Machida (1903-1967), who worked as an urban planner of the Ministry of Home Affairs before World War II (WWII) and the Ministry of Construction after WWII in Japan. The main points based on the making of his chronology and the analysis of documents written by him are as follows; 1) In Postwar Reconstruction Urban Planning, he worked as the center figure of the engineers in the War Disaster Reconstruction Institute after WWII and the Ministry of Construction by utilizing the experience and knowledge of the Tokyo Reconstruction Project after the Great Kanto Earthquake. 2) In Capital Construction Planning, he worked as a secretary general in the Committee on Capital Construction Planning. Especially, he was instrumental in Satellite city Development Plan and Metropolitan Expressway Plan in Tokyo by utilizing his experience in the prewar research on regional planning and the postwar inspection tour to the US.

 The ancient record of Izumo Fudoki (edited in 733) is not only almost complete book, but also contains detailed geographic data (surveying data) not found in the others. Among them, the sizes (lengths) of two lakes are shown. Usually, the sizes (lengths) of lakes are thought as the perimeters in Japanese. However, they do not match the perimeters based on geological estimation. We explore the reasons for the inconsistency based on previous studies, then inferred that it may indicate the lengths of the waterways. It is a practical display to make the tour schedules.