Yoshinogawa Valley Renovasi Gedung Kantor Pusat oleh Wataru Sato

Karya Yoshinogawa Valley Renovasi Gedung Kantor Pusat oleh Wataru Sato adalah pemenang yang sangat dihormati dari 2026 A' Design Award Perunggu yang sangat bergengsi dalam Kategori Kompetisi Desain Arsitektur, Bangunan dan Struktur.

PerungguArsitektur· 2026

Yoshinogawa Valley Renovasi Gedung Kantor Pusat

oleh Wataru Sato

Klien: KITAOKA Group

Pemenang A' Design Award Perunggu dalam Kategori Arsitektur

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Tentang Yoshinogawa Valley Renovasi Gedung Kantor Pusat

Proyek ini merupakan renovasi gedung kantor prapabrikasi berusia 40 tahun yang dilakukan tanpa pembongkaran. Sebuah rongga linear sepanjang 50 meter disisipkan di bagian tengah struktur yang ada, sejajar dengan poros timur-barat Sungai Yoshino, sehingga menata ulang bangunan menjadi dua sayap yang membujur utara-selatan. Dinamai Lembah Sungai Yoshino, operasi spasial ini membentuk tulang punggung arsitektur tersebut. Skylight yang berorientasi ke utara menghadirkan cahaya alami yang stabil, sementara ventilasi pasif tercipta melalui perbedaan ketinggian dan tekanan. Dengan menata ulang bangunan, proyek ini menghindari terpecahnya nilai-nilai yang diusungnya.

Pengakuan

Tentang A' Design Award Perunggu

Yoshinogawa Valley Renovasi Gedung Kantor Pusat adalah pemenang A' Design Award Perunggu, pengakuan yang sangat bergengsi yang diberikan kepada desain luar biasa yang dicirikan oleh kreativitas, kecerdikan, dan ketajaman. Pemenang Perunggu adalah artefak yang sangat terampil dan sangat kreatif yang membuktikan pengalaman luas, imajinasi, dan kelihaian para desainernya. Yoshinogawa Valley Renovasi Gedung Kantor Pusat diharapkan menjadi objek yang sangat dihargai, dikagumi, dan dicintai, sangat profesional dan inovatif. Desain pemenang A' Design Award Perunggu ini menyertakan praktik terbaik dalam seni, sains, desain, dan teknologi, dan sangat baik dalam perhatiannya pada detail. Yoshinogawa Valley Renovasi Gedung Kantor Pusat memuaskan kebutuhan dengan indah, menyentuh keinginan, memikat perasaan, dan menarik rasa ingin tahu.

Di Balik Desain

Kit Pers

Kredit, anggota tim, dan detail teknis yang disediakan oleh desainer.

Keunikan: 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.
Dimensi & Kemasan: 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.
Tag: Prefabricated office renovation, open lounge, atrium and skylight, regional architecture, nature-inspired workspace, Yoshino River
Teknologi Produksi: 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.
Tantangan Desain: 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.
Riset: 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.
Inspirasi: 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.
Durasi Proyek: The project started in January 2023 in Miyoshi Town, Tokushima Prefecture, Japan, and was completed in August 2024.
Alur Operasi: 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.
Kredit Gambar: 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.