Douraku-ann Diaeta Theana Portabilis ab Tsukasa Kawahara and Tadayuki Yabuta

Opus Douraku-ann Diaeta Theana Portabilis a designatore Tsukasa Kawahara and Tadayuki Yabuta est victor maxime honoratus praemii praestigiosissimi 2026 Praemium A' Design Award Ferreum in Categoria Certaminis Designatio Interior.

FerrumInterior· 2026

Douraku-ann Diaeta Theana Portabilis

a Tsukasa Kawahara and Tadayuki Yabuta

Cliens: Portable Tea Room Douraku-ann

Victor praemii Praemium A' Design Award Ferreum in Categoria Interior

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Victor Praemii Verificatus

Verifica Statum Praemii pro #182603

Visita Situm Vide apud A' Design Award Communicatum Insigne Praemii

Colores

Designum

De Douraku-ann Diaeta Theana Portabilis

Douraku-ann est diaeta theana portabilis, ad usum temporarium in variis locis destinata. Forma duorum tatami principia spatialia Iaponica tradita intra parvam aream sequitur. Compages e cedro domestica et tabulis cedrinis compactis facta est, unitatibus metallicis conexivis iuncta ad stabilitatem et levitatem. Parietum tabulae ex reliquiis iunci factae sunt, materiae qua pavimenta tatami sternuntur. Modulus fundamentalis latitudine, altitudine et profunditate duo milia millimetrorum metitur, et unitatibus additis amplificari potest. Partes plicabiles compositionem sine instrumentis, transportationem facilem et usum iteratum permittunt.

Agnitio

De Praemium A' Design Award Ferreum

Douraku-ann Diaeta Theana Portabilis victor est Praemii A' Design Award Ferreum, honoris amplissimi formis bonis dati, quae postulatis professionalibus et industrialibus ab creationibus bene formatis exspectatis satisfaciunt. Victores Ferrei magnam peritiam, altam specializationem, intellectum periti et facultatem creandi auctorum suorum ostendunt. Exspectatur Douraku-ann Diaeta Theana Portabilis creationem multum aestimatam, admiratam et carissimam, practicam et novam fore. Haec forma Ferreo victa optimas industriae consuetudines integrat et proprietates technicas idoneas, cum scientia et talento coniunctas, habet. Douraku-ann Diaeta Theana Portabilis ob diligentiam suam honoratur et ad vitae qualitatem emendandam formatum est, ut mundum meliorem reddere iuvet.

Post Designum

Fasciculus Nuntii

Merita, sodales gregis et singula technica a designatore praebita.

Proprietates Singulares: This project originated from the intention to reinterpret Japan’s environmentally mindful culture and the philosophy of mottainai in a socially meaningful way. By transforming leftover materials from furniture production into architectural components, the design preserves the aesthetics of traditional Japanese spaces while reducing waste and promoting sustainable practices. The two‑tatami tea room, known for its ability to create intimacy and cultural depth within a small footprint, serves as the conceptual foundation for this portable community space.
Douraku-ann demonstrates that meaningful social interaction does not require large or permanent architecture.
Its modular frame, foldable panels, and simple assembly with basic tools enable the structure to be transported,
reused, and installed repeatedly with minimal environmental burden. This mobility democratizes access to
Japanese spatial culture and encourages spontaneous gatherings in diverse environments.
By merging reclaimed materials with contemporary construction methods, the project proposes a sustainable model for community‑oriented architecture. It is both a continuation of cultural heritage and a forward‑looking vision for environmentally responsible spatial design—an intimate space that fosters human connection while minimizing ecological impact.
Dimensiones et Involucrum: Douraku-ann's structure is composed of pillars and beams crafted from domestic cedar and cedar plywood. The frame is assembled using REV metal joint units, ensuring high structural stability while maintaining a lightweight and highly portable form. Its basic module measures W2000mm x D2000mm x H2000mm + H300mm and can be expanded by adding additional units. The foldable, modular system allows for efficient packing, easy transportation, and flexible installation across diverse environments.

The wall panels are sustainable components made from off‑cuts of rush grass, the raw material used in traditional tatami flooring, further reinforcing the project's ecological ethos. Each element incorporates a contemporary aesthetic while utilizing environmentally responsible Japanese materials, resulting in a structure that harmonizes technical precision with cultural authenticity.
Notulae: Portable Tea Room, Dourakuann, Japanese Spatial Culture, Modular Architecture, Joint System, Sustainable Design, Reclaimed Wood, Community Formation, Small Public Space, Wabi Sabi, Hospitality Space, Mobile Architecture, Foldable Structure, Cultural Reinterpretation, Design Research, Spatial Intimacy, Pop up Space, Traditional and Contemporary, Human Interaction Design
Technologia Productionis: Douraku-ann is a portable Japanese style spatial unit constructed from recycled timber and an engineered assembly frame. The joint system was optimized to achieve strength and stability with minimal components allowing quick assembly.

Foldable elements combine portability with durability, enabling flexible modular configurations. Recycled timber from furniture production is refined through careful finishing enhancing sustainability. The project reinterprets the traditional two-tatami tea room in a contemporary form creating a culturally rich and environmentally conscious space.
Provocatio Designandi: The main challenge was achieving portability ease of assembly and structural durability while preserving the essence of the traditional tea room. Adapting a fixed delicate architectural form into a mobile structure required reinterpretation of its cultural values.

Constraints included safety regulations material selection and production feasibility. These were addressed through a modular joint system foldable components and repeated testing. The project demonstrates that traditional aesthetics and modern mobility can coexist and create new forms of social interaction.
Investigatio: This practice-based design research explores adapting the traditional Japanese tea room to contemporary lifestyles through the portable tea room Douraku-ann. The study investigates how compact spatial units influence community formation and interpersonal dialogue.

From 2012 to 2025 installations were conducted in diverse environments to collect qualitative data through observation interviews and analysis. Experiments with alternative materials examined adaptability.

Results show that even a minimal space can generate comfort and intimacy encouraging meaningful conversations among strangers. The study highlights how portability and traditional spatial principles can create new small public spaces and reshape social relationships.
Inspiratio: Douraku-ann is a mobile collapsible tea room that can be deployed in virtually any environment, creating a refined traditional Japanese spatial experience. This compact structure embodies the aesthetics of Japanese beauty and the spirit of hospitality, offering an intimate setting with cultural depth. Crafted using reclaimed timber and off‑cuts from traditional materials, it also reflects an eco‑conscious approach rooted in the Japanese philosophy of valuing resources. Its mobility enables it to introduce an authentic Japanese atmosphere with elegance and precision. As a contemporary reinterpretation of historical communal spaces, it carries forward cultural lineage while evoking tranquility and the contemplative qualities of wabi‑sabi.
Duratio Operis: Douraku-ann was conceived by Tsukasa Kawahara and installed for a one-day event in Kyoto, Japan on March 12, 2023. The project demonstrated the qualities of modern Japanese architecture while emphasizing the importance of cultural preservation. It also included field studies to deepen its cultural and architectural relevance.
Cursus Operationis: Douraku-ann creates an immediate Japanese atmosphere in any setting and adapts to various uses. It can function as a Japanese style room community hub conversation space tea ceremony area relaxation space or retreat depending on user needs.
The modular frame assembles without tools, and panels unfold to form a complete environment within minutes. Once installed, it naturally encourages calmness, dialogue and shared experiences. Its versatility allows users to shape the space freely, making it a platform for interaction and community building.
Membra Turmae: Tsukasa Kawahara Chief Designer
Tadayuki Yabuta Designer
Kana Hashizume Designer
Koji Sakai Director
Ayumi Shima Collaborative Designer
Tomoyuki Kitatani Designer
Dourakuann Team
Agnitiones Imaginum: Photo Basic Style Douraku-ann Seishi Maeda
Event Documentation Tadayuki Yabuta
Arrangement Style Yoshiaki Kita