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Light Chimney Retreat with Soundproof Cement Board Enclosure

Authors:
Polpipat Naksawat, Teerakan Wattanayon, Ratasakon Chantaluxsul
Light Chimney Retreat with Soundproof Cement Board Enclosure
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Constructed around a light chimney that channels natural illumination, the design uses soundproof cement board to create a tranquil retreat for meditation within the urban hustle of Tokyo.
5 key facts about this project
01
Light chimney enhances natural light and provides a unique focal point for the space.
02
Cement board offers soundproofing to minimize urban noise for a serene experience.
03
Swings integrated into the structure evoke childhood memories and encourage relaxation.
04
Seasonal adaptability allows for adjustments based on climate for user comfort.
05
Strategically located at Shibuya Station, providing easy access for commuters seeking refuge.

Hidden Buranko is located in Shibuya, Tokyo, and serves as a space for meditation and reflection. It addresses the overwhelming aspects of city life, providing visitors with a moment of calm amid the fast-paced environment. The design combines playful elements with practical functionality, allowing individuals to escape the stress of everyday urban living.

Design Concept

At the core of Hidden Buranko is the reinterpretation of swings, a familiar childhood element that evokes feelings of joy and nostalgia. This design encourages users to engage with their surroundings in a refreshing way. The swings offer a chance to reconnect with personal memories, serving as a tool for relaxation and emotional grounding. In a public space, this interaction can foster a sense of community and shared experience.

Light Chimney

A defining feature of the design is the light chimney, which plays an important role in enhancing concentration and focus. The chimney draws in natural light, helping users leave behind the noise of city life as they immerse themselves in a tranquil atmosphere. By promoting reflection and mindfulness, the light chimney aligns with the aim of encouraging users to experience the present moment fully.

Seasonal Adaptability

The design also takes into account seasonal changes, allowing for adjustments according to the climate. In winter, the chimney can be lowered to keep the interior warm. In summer, raising it allows for cooling airflow, creating a comfortable environment. This flexibility enhances user experience, ensuring that the space remains relevant and inviting throughout the year.

Materiality

Hidden Buranko is constructed using a light steel frame and cement board. The steel frame provides the necessary strength while enabling easy assembly and disassembly. This makes relocation straightforward, should it be needed. The cement board contributes to soundproofing, helping block external noise and distractions. This consideration makes the meditation space more serene and focused.

Positioned in Shibuya Station, Hidden Buranko becomes a part of commuters' daily routines. It offers a retreat from the pressures of urban life. The playful design invites individuals to pause, reflect, and find some peace in their busy day. Each element works together to create a thoughtful space where connection with oneself can flourish in the heart of a bustling city.

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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