This study examines the condominium management practices at MOJI-KO RETRO HEIMAT, yielding these findings:

1. Governance Practices: Resident owners effectively compensate for non-participation by absentee owners. The board of directors, demonstrating strong business acumen, maintains stable and rational management operations.

2. Building Maintenance: While substantial costs are required to preserve the aesthetic quality of the exterior, systematic implementation of major renovations has been achieved through reserve fund increases and prudent financial management.

3. Problem Solving Approach: The association employs diverse and flexible solutions tailored to specific issues, utilizing expert consultation following thorough root cause analysis.

This study develops a mixed-integer programming model for area-wide public-housing stock reorganization, selecting buildings for demolition or retention under essential spatial and operational requirements. The formulation enforces connectivity, road-access feasibility via reachability to designated gateway buildings, and a dwelling-unit balance constraint to enable temporary relocation. Using data for 160 buildings in Kobe, Japan, the model outputs an optimal plan and nine near-optimal alternatives within practical runtimes. Benchmarking against DFS-based enumeration confirms matching optimal values on small instances, while the proposed model scales to larger ones, supporting iterative and transparent planning.

New York City intended to redevelop slum so-called ‘Gas House district’ in Manhattan in the 1930s. Metropolitan Life Insurance Company participated in the project. When the Company presented the project’s plan named ‘Stuyvesant Town,’ Marcel Breuer proposed his own plan for the project to present some standard on the living conditions for the large housing projects after World War II. Then, the affirmation of large-scale urban redevelopment promoted environmental improvements in large cities. And it is suggested that this proposal provided some ideas for large urban developments after World War II like ‘Toulouse le Mirail' etc.

This study aims to clarify the factors influencing rent formation of the rent of elderly housing with supportive services in Tokyo. Using data from 403 facilities, the relationship between land value and rent per unit area was analyzed, and a quantification theory type II model was applied. Results indicate that higher rents are associated with medical- or care-oriented facilities, while lower rents are linked to independent-living types. Internal operational factors, rather than land value, significantly affect rent levels. The findings reveal a spatial pattern: care-oriented facilities in suburban areas and independent-living ones in central Tokyo.

This study examined the relationship between house adaptations of visually impaired individuals and health-related quality of life (HRQOL), using a questionnaire survey. Frequent safety-related adaptations included installing handrails and designating fixed locations for belongings, whereas comfort-related adaptations involved strategic furniture arrangement and minimizing objects. Safety-related adaptations at entrances and stairways were not associated with HRQOL score. HRQOL was associated with perceived hazards in the bathroom, kitchen, and living room, and with comfort-related adaptations. House adaptations in areas where individual roles and independence are expressed may be related to HRQOL. It suggests that, beyond fall-prevention-focused approaches, person-tailored approaches may improve HRQOL.

This study identifies key regulatory barriers in China’s building codes that limit the conversion of schools into nursing homes. Restrictive indicators, such as Maximum allowable evacuation distance, Stair dimensions, Elevator installation requirements, Barrier-free circulation design, Architecture functionality, Occupant capacity, and Approval procedures, have significant effect. Owing to the substantial additional renovation costs they impose, these indicators hinder the adaptive reuse of school buildings into senior care facilities. Governmental subsidies and policy support are recommended to address the financial and procedural challenges. The findings support more flexible regulations and financial incentives that improve the feasibility of adaptive reuse.

This study examines the development of art museums in Ibaraki Prefecture from three perspectives. First, it identifies deep cultural foundations, including spiritual traditions, scholarly practices, and Okakura Tenshin’s activities in Izura, that shaped a distinctive reception of the art museum concept. Second, it traces institutional transitions from the prewar to postwar periods, showing how relocations and adaptive reuse of cultural facilities formed a regional operational framework. Third, it analyzes architectural developments after 1980, revealing complementary roles assumed by prefectural, municipal, and private museums within a multilayered cultural landscape in modern regional Japan today and beyond.

This paper advances conventional OD estimation models from cross-sectional counts by introducing an Origin–Stopover–Destination (OSD) framework that explicitly models time-varying in-store dwell between origins and destinations. We integrate cross-sectional flow surveys, mobile phone location data, and occupant observations to estimate unknown parameters. Applied to a large underground pedestrian mall, the model estimates inflows/outflows, aisle-level flows, and store occupancy, yielding close agreement with observations. Inferred occupancies reveal attribute-dependent mean dwell times across stores. We further simulate traffic shifts under a subway extension scenario.

Okinawa Prefecture announced its policy on wood utilization in public buildings in March 2012. However, no public wooden buildings have been commissioned by the prefecture in the 12 years up to fiscal year 2023. The purpose of this study is to clarify the regional characteristics regarding the use of wood in buildings in Okinawa Prefecture. By analyzing the actual production processes of non-residential wooden buildings in the prefecture, this study also examines the roles of designers in the production of non-residential wooden buildings, with particular attention to regional factors influencing wood utilization in buildings.

Supportive spaces at Maggie's Cancer Caring Centres were analyzed on the following 2 aspects:

1. Actual usage at 19 Maggie's Centres were analyzed based on interviews and observations, focusing on 16 designated spaces and elements outlined in the Architectural Brief, as well as characteristic usage patterns by visitors and staff.

2. Changes in spaces and usage identified at 15 Maggie's Centres were categorized into 6 key reasons based on an interview with the in-house architect: increased visitor numbers, diversification of activities, creation of a domestic atmosphere, enhanced practicality, improved safety, and completion of the original plan.

This study analyzes 37 sea-cave sacred spaces in Japan, integrating structural types of faith narratives with surrounding geographical conditions. Faith narratives are reorganized into five types based on similarities in narrative structure, and their tendencies and regional variations are examined to clarify how sacredness has been attributed to sea caves. Six kinds of geographical data are then compiled for each site. By comparing narrative types with geographical indicators, the study explores why particular sea caves were selected as sacred sites and what spatial factors have supported the establishment and persistence of faith.

This study examines the Mukonoso Residential Area in Amagasaki, developed by Hankyu Railway in 1937. It clarifies land ownership, building construction, and residency patterns during the early development stage, highlighting the diversity of the area. Findings show that multiple land ownership, leased land, rental housing, and the coexistence of neighboring residences created a distinctive residential diversity, differing from the typical model of one household occupying a single residence on a single plot.

This study clarifies the trend and factors of consolidation into Residential Induction Zones within the Public Housing Management Plan and has reached the following conclusions:

1. The Location Normalization Plan (LNP) has minimal impact on the public housing policy. Public housing departments prioritize existing site conditions over consolidation into Residential Induction Zones.

2. The ongoing trend of housing consolidation is primarily driven by the demolition of aging stock, not by LNP policies.

3. Overall, location changes depend on the condition of existing sites, suggesting the LNP is not a primary factor in the public housing planning of local governments.

This study examines the dynamic adaptability of Dashilar’s hutong system and its role in maintaining street vitality and functional mix in Beijing’s old city. Defined as small-scale incremental adjustments without large reconstruction, dynamic adaptability is evaluated through four dimensions: network connectivity, human-scale proportion, functional mix, and street-edge interaction. The results indicate that Dashilar’s well-connected network and human-scale streets support walkability and small-scale commerce, while historical comparison reveals how the area has continuously adapted to socio-economic changes, maintaining long-term street vitality through such adaptive spatial processes.

This study examines approaches to implementing flood control measures in residential areas and presents the following findings.

1) The project was divided into three stages, accompanied by shifts in local actors.

2) Among 44 households subject to project, about half implemented land elevation, 40% removed their houses, and 10% declined participation.

3) The designation of disaster risk areas reduced future exposure to flood damage.

4) The national government served as the project leader, while the local government acted as an intermediary between it and residents.

5) Community organizations, which differed by district, played a key role in consolidating local opinions.

Since 2020, the disclosure of flood risk information has been mandatory for all real estate transactions in Japan. This study examines how this requirement has affected people’s awareness of flood risk and choice of residence. An online questionnaire was conducted among residents who had relocated to 5 municipalities in the Tokyo metropolitan area within the 2005-2025. The results indicate that residents who moved after the disclosure requirement was enforced showed greater awareness of living within inundation-prone areas; in comparison, the number of people who independently sought information and prioritized flood risk in their residential choices remained largely unchanged.

This study organizes tools developed to achieve consensus building process with stakeholders, analyzing them within the DIAD framework (Diversity, Interdependence, Authentic Dialogue) of Communicative Planning. A literature review resulted in classifying these tools into eight types. Subsequently, a chronological analysis of the tools and their features identified three periods and reveals that tools have been developed in response to the social context. Furthermore, this study suggests that these tools fulfill the elements of the DIAD framework—with the exception of "stakeholder identification"—and have the potential to introduce new forms of participation, induce self-reflection, and correct imbalanced power relations.

I examined the potential and future direction of vacant house management by Silver Human Resources Centers as a local initiative. Approximately half of the centers managing vacant houses collaborate with local governments. It is necessary to raise awareness that these centers are involved in vacant house management. Furthermore, centers not currently managing vacant houses face limitations in the work they can undertake due to labor shortages and the aging of their members. It is essential to establish an environment where Silver Human Resources Centers can engage in vacant house management by collaborating with local governments, regional businesses, and neighboring centers.

This paper investigates dried earth, straw fibers, and pre-mixed earth, determining CO₂ emission factors for the product stage based on surveys of nine producers in Japan. Since these producers are small-scale and rely on local sourcing, emissions from A1 and A2 are minimal; most emissions originate in A3, where higher quality requirements reduce production efficiency and increase emission factors. Emissions per unit mass range from 6.09×10^-3 to 1.01×10^-1, 4.80×10^-2 to 3.06×10^-1, and 7.73×10^-3 to 2.88×10^-2 kg-CO₂/kg, respectively. These factors provide essential foundational data for the Life Cycle Assessment of earthen architecture.

This study investigated the site planning for the Tokyo Taisho Exposition in 1914. Focusing particularly on the discourses of architects Seiichiro Chujo and Minoru Ikeda, it clarified the following points. The site plan was formulated considering the renovation of existing facilities and the transplantation of trees. The First Site was created through the fusion of the Secessionist movement and fine art. The Second Site emphasized the zeitgeist of the exposition era, arranging pavilions based on Orientalist styles. The architects involved in the exposition imbued the entire site plan with its thematic concept.

This paper seeks to clarify the historical significance of architectural design of Kōfūkyo building and landscape design of the garden space of Hake (Kokubunji cliff line), through the reconstructive analyses based on field surveys. The contents are as follows.

1. History of the Kōfūkyo building before its relocation to Taizansō, particularly its development during the Seiwaen period.

2. Architectural characteristics of the Kōfūkyo building after its relocation to Taizansō and its relationship with the garden of Hake.

3. Composition of waterscape (waterfall, stream and pond) of the garden of Hake－the characteristics of its design and stone types.

During the Meiji period, traditional architecture faced a crisis of continuity, shifting the activities of local carpenters. This study analyzes the “Iwaki Family Documents” to chronicle the career of Shonojo Iwaki. The analysis shows how local carpenters expanded their activities and highlights their roles in traditional construction projects. Shonojo successfully participated in numerous construction endeavors by leveraging personal connections acquired through large-scale projects and utilizing his technical expertise. Furthermore, he supported these projects through his practical skills. In contrast to the activities of master carpenters, architects, and engineers in organizations, his work contributed to the inheritance and development of craftsmanship.

In this paper, I analyze passages through Passage du Grand-Cerf, one of the passages in Paris. First, I consider the façade and the interior of L’hôtellerie du Grand-Cerf utilizing "Plan de Turgot" (1739) and "Le plan Vasserot" (1810–1828). In addition, I identify Passage du Grand-Cerf as an expression of a passage on the 1695 map and the name related to this passage on the 1763 map. Finally, I ponder the interior of this passage with the "Cadastre Napoléonien" (1828) and clarify how the hôtellerie was changed into this passage using other maps.

In 1908, the Prussian government issued a measure to shape landscapes using architectural forms rooted in local customs to prevent landscape degradation caused by modernization. One approach was to raing public awareness through lectures using recommended literature. This literature included surveys of Farmhouses by architects and collections of works from design competitions and publications by members of the Deutsche Bund Heimatschutz (German Homeland Preservation League). This shows that the government not only protected unique landscape but also promoted construction and renovation of Bauernhäuser (farmhouses) and Bürgerhäuser (middle-class dwellings) designed in forms rooted in local customs and inherited practices of building.

The basis for determining the construction date of Chinese Siheyuan residence is generally derived from inscriptions on the buildings themselves. Where such inscriptions are absent, the building’s history is inferred through oral history surveys. This study focuses on the Wen’s Residence, a designated cultural property, and proposes a new research method for estimating the architectural age more precisely than oral history by analyzing related records such as plaque inscriptions and the head of household's family tree.

This study analyzes spatial depth in architectural photographs of Japanese houses from the 1960s and 1970s through three aspects.

1. Establishing a framework by defining the elements that create depth and the depth representation, and by classifying categories of depth.

2. Extracting spatial characteristics—equivalence, bias, simplicity, and complexity—from these categories to discussion on abstraction and figuration.

3. Using these characteristics as indices to clarify how the historical publication context and the differences among photographers influenced the spatial expressions in architectural photographs.

Referential relationship of scale in contemporary houses are analyzed based on the following three aspects.

1. Referential relationships between scale are divided into two categories: "integration", and "contrast".

2. Referential scale is divided into three main categories: I. relationships between individual referential targets, II. relationships between units with reference relationships, and III. relationships where one referential target belongs to multiple relationships.

3. Domestic and international residential works from the 1970s to the 2010s were analyzed in terms of referential relationship of scale, and their diachronic trends we clarified.

This paper aims to clarify the forms and their transformations of live-work integration in 185 buildings across 72 Kyoto hand-painted Yuzen workshops. The following results were obtained: First, ten of the thirteen occupations required a work areas less than 60 m². Second, counting adjacent buildings within the same workshop as one, there were 177 buildings, and 137 of these were live-work integration, classified into six forms based on occupied area and ground contact. Third, while 45 workshops maintained integration, others shifted to separation or later re-integrated, indicating a flexible adaptation to changes in production scale or individual circumstances.

This paper focuses on core terms used in the practice of architectural heritage conservation in China—such as “baocun”, “baohu”, “weixiu”, and “xiushan”—to explore their historical development and semantic shifts since modern times. By examining legal regulations, technical literature, and corpus data, the study reveals how changes in terminology reflect broader transformations in historical context and professional discourse. By clarifying the differing scopes of these terms, this paper reveals the conservation philosophies reflected in terms, offering insights into the cultural and conceptual nuances shaping heritage practices.

This study examined how Japan’s regional plans for the preservation and utilization of cultural properties are developed and implemented. Using a nationwide survey of 168 certified municipalities, it analyzes planning processes, expectations, and challenges. It also examined how certification of the plan for the maintenance and improvement of the historic landscape and municipal classification affect local governments’ perceptions of regional plans. For many items, municipalities with smaller populations selected diverse options that differed from one municipality to the next, suggesting that initiatives reflect local circumstances. However, it is clear that towns and villages face significant financial challenges when implementing plans.

In this paper, we introduce a unified framework for automatic room segmentation and graph extraction from floor plans. We sample random points within the activity space and cluster them using obstacle-aware travel distances and visibility to form initial room regions, then apply a linear mapping to infer inter-room relationships. Tested on the RPLAN dataset and representative spatial layouts, our method achieves high accuracy and produces visually intuitive room segmentations. Our method can facilitate large-scale plan comparison and retrieval, support spatial analytics, and assist computer-aided architectural design.

This study analyzes changes in word frequency and meaning in the AIJ Annual Conference Proceedings (2008–2023) to clarify the linguistic dynamics of architectural research. Common words across four subfields were examined through time-series clustering, and semantic change was further analyzed using word vectors for three subfields. The results show that some words respond sharply to social events while others remain stable, reflecting differences in subfield sensitivity. Semantic analysis revealed patterns of divergence, convergence, and stability, highlighting how architectural discourse evolves in response to social and disciplinary shifts.

This study examined the utilization of local resources (physical resources, human resources) in educational programs utilizing local resources at 266 high schools in Hokkaido, Japan (92 valid responses). Cluster analysis identified six distinct clusters based on thematic approaches. Clear differences among clusters were observed in terms of utilized physical resources, collaboration with human resources, implemented educational content, and recognized challenges.