This paper clarifies the historical significance of the port work carried out at Shonan Port in the prewar period. Then, while clarifying the outline of the work, I tried to consider how the position and role of Shonan Port changed before and after the Japanese colonial rule, and before and after the port construction work.

 The points clarified in this study were the viewpoints that were not paid attention to in the previous studies, and the historical phenomena that left the study blank. Therefore, we believe that the results of this research will fill the holes in pre-war colonial research, including Japanese history.

 Dry stone walling, a traditional technique that is valued from environmental perspective, may have diverse strengths that cannot be measured only by the strength of the structure such as “toughness” that does not make the function as a structure zero after the disaster.

 In this study, a total of 452 cases of damage to retaining walls and revetments were collected from Shikoku and Kyushu, and photographs were classified according to the part of destruction of the structure, and the behavior during destruction was observed. As a result of observation, dry stone walling is a structure that can be effective after it is broken, (1) it breaks small, (2) it is hard to lose its function when it breaks, (3) it is easy to recover, (4) there is a possibility that the risk of secondary damage is low.

 J. D. Justin, an American civil engineer, conducted a survey of the Wushantou Dam, which is the central facility of the Chianan Irrigation project, for about half a year in the 1920s. He was called an authority by the people involved in the business and has been said so in the literature that mentioned. In reality, he was not an authority in the 1920s, but had a keen opinion about Wushantou Dam. The relationship with Justin left a big impression on Hatta Yoichi and his surroundings. It cannot be said that the Governor-General of Taiwan made sufficient preparations and adjustments at the time of the invitation, which constrained Justin’s activities in Taiwan. Justin's steady achievements made him an authority on hydraulic engineering in his later years.

 In this study, we focused on Yasobe Tamenaga IZAWA, an official from the Kishu Clan, who was summoned by Yoshimune Tokugawa, the eighth general of the Tokugawa Shogunate of Japan. In both Kishu (currently Wakayama Prefecture) and Musashi (currently Saitama Prefecture), the number of documents that describe the achievements of Yasobe Tamenaga IZAWA that are not listed in the primary sources has increased over time. Therefore, we have collated previous studies and primary historical materials related to Yasobe Tamenaga IZAWA and the development of social infrastructure in the Kishu Clan.

 The findings revealed that the details of Yasobe Tamenaga IZAWA were not mentioned in the “Nanki Tokugawa-shi” for the period from 1602 to 1871, which summarizes the achievements of the Kishu Clan. Furthermore, it was found that several studies and editorials have been published on the Minuma irrigation canal in Saitama Prefecture without presenting the primary historical materials upon which they are based. Finally, we demonstrated the need to clearly reference historical facts from accurate historical materials.

 This study compares the urban history and post-disaster urban planning of five cities affected by the Great East Japan Earthquake and the West Japan Torrential Rains. We aim to analyze the spatial factors that led to the extensive damage in each city in order to promote land use management for next disasters. The location and scale of urban infrastructure development, such as transportation infrastructure development and land readjustment projects since the modern era, are investigated by the map analysis. Tsunami, which leads to catastrophic damages, and floods, which frequently happens, have had different impacts on the urban planning and the vulnerability of the cities. It was revealed that developing simultaneously disaster protection infrastructure and urban infrastructure to increase the convenience of the city were crucial to transform the city into a disaster mitigating structure after a disaster.

 This study aims to clarify the design process and mechanism of creating the riverside space in the Kamo River Improvement Project after the 1935 flood in Kyoto—the results are shown below. Against the background of differences in policy between the prefectural and the municipal governments regarding the interpretation of scenic beauty, the Kyoto Prefecture designated scenic districts and established a Landscape Committee to discuss important matters individually. After the Great Kyoto Flood of 1935, the Kyoto Prefecture took the lead in planning the river improvement, and the prefectural and municipal governments worked together to create a comprehensive landscape around the river, including bridges and urban planning. The Kyoto Prefecture formed the Kamo River Improvement Planning Committee to oversee the renovation work, and established a system of cooperation with the Ministry of Home Affairs, Kyoto City, and the Landscape Committee. Based on this system, the prefectural government designed a midstream cross-section to control flood and preserve historical landscape, and designed a waterside space, taking into consideration the opinions of the people in the coastal districts.

 This study focuses on the Riverside Park (now called Kema Sakuranomiya Park) on the former Yodo River (the Okawa River) in Osaka City, and clarifies the origin and development of park planning, the process of project decision and park formation, and the factors of its realization, based on the analysis of several primary historical documents, including an exhaustive survey of newspaper articles over 48 years. The following is a summary of the findings of this study. 1) The original concept of Riverside Park was formulated under the Sadakichi Tsuruhara municipal administration during the Meiji period. 2) The reclaimed land created by the Yodo River downstream improvement project was used for parkland, and Sakuranomiya Park was born as Japan’s first Riverside Park. 3) Before World War II, park planning was considered as part of the Park System, and Riverside Park planning was decided as the postwar reconstruction city planning. 4) After WWII, land-use change and the use of funds from the Meiji centennial anniversary project led to the development of parks, and Riverside Park in the Okawa River was realized. 5) The realization of the Riverside Park was influenced by the inheritance of an urban image that emphasized the beauty of the Riverside of the Okawa River.

 This paper summarizes industrial and technological history, assuming that sophisticated designs of reconstruction bridges after the Great Kanto Earthquake (1924.9) were realized with fabrication technologies in ship building and railway bridge building innovated through the Meiji and the Taisho era of Japan (1867 to 1926). The paper also focuses on a street bridge project in the Meiji era where three fields of engineers (shipbuilding, railway bridge, street bridge) collaborated.

 This research focuses on the process that had rapidly evolved into an industrial city in modern Ogaki. During this period, which spanned more than 30 years, a wide variety of independent public projects, such as railways, electric power industry, river improvements, and urban planning projects, were carried out in succession. From the analysis of historical materials of the implemented projects in chronological order, this study shows the leading persons of these projects (engineers of each official affiliation, and industrialist) could collaborated beyond the frame of the projects, and continually shared the concept to build a logistics infrastructure across water and land to realise an industrial city.