Lo dissènh Amami House Ostal per Kazunori Sakai es un laureat autfo estimfo del prestigfo 2026 A' Design Award d'Argent dins la Categoria de Competfo Arquitectura.

ArgentArquitectura· 2026

Amami House Ostal

per Kazunori Sakai

Client : Sakai Architects

Laureat del A' Design Award d'Argent dins la Categoria Arquitectura

14,408

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Lo Concèpte

A prepaus de Amami House Ostal

Amami House es una residéncia autosuficienta sus l'illa d'Amami, al Japon, concebuda per una familha de quatre personas. L'illa a un clima caud e umid amb de nivèls febles de radiacion solara. L'ostal permet una vida confortabla sens dependéncia de la ret electrica ni de la climatizacion. D'estrategias passivas coma la ventilacion naturala, l'esclairatge natural e l'isolacion redusisson lo besonh de sistèmas mecanics. La forma tradicionala del teulat a mièg-crestet e dos aigàs es reinterpretada amb de caracteristicas de performança contemporanèas. Un caufa-aiga solar, un sistèma de compostatge e un òrt domestic completan un pichon cicle d'autosuficiéncia.

La Reconoissença

A prepaus del A' Design Award d'Argent

Amami House Ostal a ganhat la distincion A' Design Award d'Argent, una reconeissença extraordinàriament prestigiosa acordada a de designs d'ort de gamma, esplendids e impressionants. Los ganhaires de l'Argent son d'òbras terriblament brilhantas e extrèmament creativas que illustran l'experiéncia, lo talent e la finessa excepcionals de lors designers. S'espèra que Amami House Ostal siá una òbra meravilhosa e de referéncia, notablament professionala e prigondament innovanta. Aqueste design ganhaire de la distincion A' Design Award d'Argent es una invencion fòrça notabla e admirada, que fa un ben e fa avançar las frontièras de l'art, de la sciéncia, del design e de la tecnologia. Amami House Ostal es una creacion immensament envejada que desrevelha de desirs, aduch de sentiments positius e fa néisser l'estonament e l'esmaiment.

Darrièr lo concèpte

Kit de premsa

Crèdits, membres de l'equipa e detalhs tecnics fornits pel designer.

Proprietats Unicas: Located on Amami Island, an island with a hot and humid climate and among the lowest levels of solar radiation in Japan, this self-sufficient house investigates how a family of four can live comfortably without dependence on the power grid or air conditioning.

Rooted in the island’s unique climate and culture, the design reinterprets vernacular architecture through passive strategies, including natural ventilation, daylighting, and insulation, thereby minimizing reliance on mechanical systems.

The project presents a sustainable model of living in harmony with nature, nurturing resilience, and quietly redefining what it means to dwell in the modern world.
Dimensions e Embalatge: A vacuum-tube solar water heater installed on the east-facing roof supplies domestic hot water, reaching 60 to 97 degrees Celsius in summer and around 30 degrees in winter. Only minimal backup from a gas heater is needed, reducing gas consumption to less than half of that in the family’s previous rental home. Groundwater use was initially considered, but high iron content led to the adoption of a public water supply for greater reliability. The sauna is heated with wood repurposed from local construction offcuts, creating a circular resource exchange with nearby builders. A composting system turns kitchen waste into fertilizer for the home garden, where vegetables grown on-site return to the dining table, forming a small yet tangible cycle of self-sufficiency.
Etiquetas: Off-grid housing, Passive design, Self-sufficient living, Vernacular architecture, Japan, Sustainable architecture, Resilient design, Energy autonomy, Community living, Climate-responsive design
Tecnologia de Produccion: Amami is often called the “Island of Yui,” known for its deeply interwoven social ties. Traditional celebrations for children’s milestones often bring together more than 80 relatives and neighbors, reflecting a collective culture where child-rearing is shared across families and the wider community, and homes have historically functioned as both private and communal spaces. In recent years, however, such practices have diminished due to nuclear families, standardized housing, and the impact of the pandemic. This house responds by reintroducing openness and generosity into the domestic realm, creating spaces where people can naturally gather and share time together, reviving and sustaining the island’s cultural traditions.
Desaffo de Dissènh: The hardest part was designing a truly self-sufficient house in one of Japan’s most demanding climates—hot, humid, and with limited solar radiation—while removing dependence on the power grid and air conditioning. Balancing comfort and resilience required continuous testing of passive strategies, energy autonomy, and spatial composition, with every decision responding precisely to local climate data. Equally challenging was integrating cultural elements such as the dispersed house form, the openness of yui community ties, and traditional roof expressions into a contemporary language sustaining both environmental and communal life.
Inspiracion: Inspired by the vernacular landscapes of Amami, where corrugated metal roofs are commonly seen across local settlements, the design inherits the traditional hip-and-gable roof form and integrates contemporary performance features such as insulation, ventilation, and natural lighting. Through this synthesis, the project reinterprets and reconstructs the roof as a new architectural typology that connects local identity with modern functionality.
Durada del Projècte: Design Period: February 2018 – December 2023
Construction Period: January 2024 – August 2024
Amami island, KAGOSHIMA, JAPAN.
Flux Operacional: The project gently explores a sustainable way of living in harmony with the natural environment. Embracing the unique climate and culture of the southern islands, it quietly reexamines what it means to dwell in the modern age.
Membres de l'Equipa: KAZUNORI SAKAI（ARCHITECT)
MASAYUKI TAKATA (Structural Engineer)
TOMOHIRO URATA (Garden Designer)
KAZUHIKO HANAI (Lighting Designer)
KAZUNORI KAWAGUCHI (Main Contractor)
MAKOTO TANAKA (Carpenter)
MICHIHIKO MINESHIMA (Electrical Contractor)
YASUNORI SAKAE (Plumbing Contractor）
Crèdits d'Imatges: TOSHIHISA ISHII