
04/06/2025
We visited Shibaura House, a transparent, multi-story structure situated in the heart of Shibaura and designed by Kazuyo Sejima, co-founder of SANAA. The building is a compelling case study in architectural openness, spatial adaptability, and civic engagement. Characterized by its glass façade and open floor plates, Shibaura House dissolves traditional boundaries—between interior and exterior, and between public and private realms—encouraging interaction and permeability.
At the ground level, we experienced the building’s community-oriented space, which acts as its social core—a multifunctional venue for cultural programming, educational initiatives, and neighborhood engagement. Unlike conventional office typologies, this space is deliberately porous, welcoming spontaneous participation and fostering inclusivity.
We had the privilege of hearing from Founder Masaru Ito, who shared the vision behind Shibaura House. He explained that the building was conceived not merely as a workspace but as an urban commons—a platform where creativity, dialogue, and community intersect. Ito highlighted his design brief to Sejima, emphasizing architecture’s potential as a medium for cultivating social cohesion, particularly in high-density urban contexts like Tokyo.
For the Urban Leaders delegation, the visit offered a compelling insight: architecture is not solely about constructing buildings—it is about shaping environments that sustain civic life. Shibaura House embodies human-centered urbanism, demonstrating how intentional design and programming can drive social innovation and foster resilient urban communities.
A dynamic session during Urban Leaders Retreat in Tokyo brought together four pioneering thought leaders shaping the future of Japanese urbanism through place-based innovation, community capital, and spatial ecosystem development.
Daisuke Sugawara presented the concept of a micro-network of public spaces, illustrating how the strategic integration of small-scale urban interventions can activate underutilized areas and foster inclusive civic engagement. His approach emphasized connectivity, both spatial and social, as a means of reimagining the urban fabric.
Masaru Ito, founder of Shibaura House, shared his experience in transforming a privately owned structure into a transparent, multifunctional community hub. He conceptualized this model as an embodiment of community capital, positioning architecture as an essential medium for trust-building, participatory design, and localized social infrastructure.
Christian Dimmer posed the fundamental question, “What defines a good city?” He advocated for the development of integrated socio-economic ecosystems, where resilient local economies, dense social networks, and collective creativity converge. He highlighted the importance of anchor institutions, the cultivation of social capital, and shared urban visions in fostering equitable and adaptive urban futures.
Tamura Koichiro, representing Placemaking Japan, offered insights into citizen-led urbanism. He showcased grassroots placemaking efforts throughout Japanese neighborhoods that are redefining the function and meaning of public spaces, strengthening community identity, and promoting civic pride through participatory spatial practices.
As part of the Urban Leaders Retreat in Tokyo, we had the privilege of exploring the iconic T-Site Daikanyama alongside architect Mark Dytham, co-founder of Klein Dytham Architecture. Mark provided a detailed articulation of the design philosophy behind this internationally acclaimed lifestyle complex, which seamlessly integrates retail, culture, and community within a cohesive urban framework.
At the heart of the site is the Tsutaya Books store, notable for its striking façade composed of interlocking "T" motifs—an architectural gesture that establishes a strong visual identity while referencing the brand’s typographic heritage. Mark explained how the project reimagines the bookstore as a civic and cultural hub, moving beyond its conventional retail function to become a site for social interaction and leisurely exploration.
The design strategy employs a series of low-rise pavilion-like volumes set within a verdant, pedestrian-friendly landscape. This spatial composition fosters openness, intimacy, and a village-scale ambience—inviting visitors to meander, linger, and engage with the environment in a more deliberate, contemplative manner.
Conceived as a space for slow, serendipitous discovery, T-Site Daikanyama exemplifies a nuanced synthesis of Tokyo’s modern urban lifestyle and its more traditional neighborhood character. Mark emphasized that the success of the project lies in its adherence to human-scale design principles, curated programmatic content, and refined material sensibility—elements that collectively position T-Site as a benchmark for experiential placemaking in contemporary urban retail development.
This site visit offered a compelling case study in how architectural design can elevate everyday environments into rich, immersive urban experiences.