Yoshinogawa Valley Renovaasje fan Haadkantoargebou troch Wataru Sato

Yoshinogawa Valley Renovaasje fan Haadkantoargebou troch Wataru Sato is in heech wurdearre winner fan de tige prestizjeuze 2026 A' Design Award yn Brûns yn de kompetysje-kategory Arsjitektuer, Gebou en Struktuerûntwerp.

BrûnsArsjitektuer· 2026

Yoshinogawa Valley Renovaasje fan Haadkantoargebou

troch Wataru Sato

Klant: KITAOKA Group

A' Design Award yn Brûns Winner yn de kategory Arsjitektuer

7,887

Ferifiearre Priiswinner

Ferifiearje Prisstatus foar #175868

Besykje Side Besjoch by A' Design Award Parseberjocht Priisbadge

Kleuren

It Untwerp

Oer Yoshinogawa Valley Renovaasje fan Haadkantoargebou

Dit projekt is in renovaasje fan in 40 jier âld prefab kantoargebou sûnder sloop. In lineêre iepen romte fan 50 meter is yn it midden fan de besteande struktuer ynfoege, rjochte op de east-west as fan de rivier de Yoshino, wêrtroch it gebou reorganisearre wurdt yn twa noard-súd fleugels. Dizze romtlike yngreep, mei de namme Yoshino River Valley, foarmet de rêchbonke fan de arsjitektuer. In nei it noarden rjochte dakljocht soarget foar stabyl deiljocht, wylst passive fentilaasje ûntstiet troch hichte- en drukferskillen. Troch it gebou te reorganisearjen foarkomt it projekt dat de wearden dy't it stipet ferdield wurde.

De Erkenning

Oer de A' Design Award yn Brûns

Yoshinogawa Valley Renovaasje fan Haadkantoargebou is in winner fan de A' Design Award yn Brûns, in heech prestisjeuze erkenning foar treflike ûntwerpen dy't har ûnderskiede troch kreativiteit, fernuft en tûkens. Brûnswinners binne tige feardige en opfallend kreative artefakten dy't de grutte ûnderfining, ferbylding en betochtsumens fan har ûntwerpers befêstigje. Fan Yoshinogawa Valley Renovaasje fan Haadkantoargebou wurdt ferwachte dat it in tige heech achte, bewûndere en dierber objekt is dat opmerklik profesjoneel en ynnovatyf is. Dit winnende ûntwerp fan de A' Design Award yn Brûns yntegrearret de bêste praktiken yn keunst, wittenskip, ûntwerp en technology en is treflik om syn omtinken foar detail. Yoshinogawa Valley Renovaasje fan Haadkantoargebou foldocht behoeften prachtich, reitsjet winsken, betsjoeveret gefoelens en sprekt nijsgjirrigens oan.

Efter it Untwerp

Parsepakket

Credits, teamleden en technyske details levere troch de ûntwerper.

Unike Eigenskippen: Inspired by the Yoshinogawa River, the design translates the structure of a valley into architecture. By dividing the existing building into two volumes and inserting a linear void, a valley-like interior is created.
A 50-meter skylight brings daylight inside, while the void enables ventilation, greenery, and social interaction. This configuration integrates environmental elements into the workplace.
Through renovation, the design reinterprets an existing office and proposes a new spatial model.
Ofmjittingen & Ferpakking: A valley-like void and continuous skylight are introduced at the center of a 50-meter prefabricated office building. The two-story void brings daylight to the ground floor and enhances natural ventilation.
A 7-meter Benjamin fig tree is placed at the center, visible from both levels. Planting along the void forms a layered green environment connected to the exterior.
Existing structure and finishes are retained, creating a composition where old and new materials coexist.
Labels: Prefabricated office renovation, open lounge, atrium and skylight, regional architecture, nature-inspired workspace, Yoshino River
Produksjetechnology: The project renovates an existing prefabricated office building without demolition.
A central valley-like void integrates daylight, ventilation, and greenery. Continuous skylights provide stable north light, while passive ventilation is driven by height and pressure differences.
Spatial organization is redefined as an environmental system, reducing reliance on mechanical equipment. Existing structure and finishes are retained, forming a layered expression and a sustainable model for reuse.
Untwerpútdaging: The primary challenge was to renew the environmental and social value of a deteriorated prefabricated office without demolition or new construction.
Introducing a skylight and central void into an enclosed structure required coordination of structural, safety, and cost constraints.
Rather than relying on equipment, the design redefines spatial organization as an environmental system.
The project shows that architectural operations can generate new value within existing buildings.
Undersyk: This research examines how renovation can achieve environmental performance comparable to new construction.
A skylight and central void introduce daylight and passive ventilation, reducing reliance on mechanical systems.
Monitoring shows that artificial lighting is unnecessary during daytime and HVAC demand is reduced. Annual energy decreased by about 73,000 kWh, with savings of 65% in lighting and 30% in air conditioning.
The project presents a replicable model for sustainable renovation.
Ynspiraasje: The project draws inspiration from the Yoshinogawa River, known as the Mother River of Tokushima.
Rather than referencing its form directly, the design interprets the river as a spatial structure.
By inserting a linear void through the existing building, the architecture transforms the logic of a valley into an interior condition, bringing light, wind, and greenery deep into the space, while also inviting relationships among people, families, and the local community.
Projektdoer: The project started in January 2023 in Miyoshi Town, Tokushima Prefecture, Japan, and was completed in August 2024.
Operaasjestreamferrin: The building transforms a closed office into an open environment accessible to families and the local community.
The central valley acts as a social axis supporting movement, staying, and interaction. The ground floor serves as a shared space, while the upper floor provides flexible work areas.
Users are not assigned fixed workplaces but choose spaces as needed. Through everyday use, the project encourages informal encounters and redefines how work and social life coexist.
Ofbyldingskrediten: Image #1: Photographer Keita Yamamoto (Architectural Photography), Kitaoka Group Headquarters Renovation, 2024.
Image #2: Photographer Keita Yamamoto (Architectural Photography), Kitaoka Group Headquarters Renovation, 2024.
Image #3: Photographer Keita Yamamoto (Architectural Photography), Kitaoka Group Headquarters Renovation, 2024.
Image #4: Photographer Keita Yamamoto (Architectural Photography), Kitaoka Group Headquarters Renovation, 2024.
Image #5: Photographer Keita Yamamoto (Architectural Photography), Kitaoka Group Headquarters Renovation, 2024.