A Ceremonial Tribute to Forests
Japan‘s Onodatesho Pavilion, crafted from regional cedar and cypress, stands as a ceremonial centerpiece for the National Tree-Planting Festival, an eco-focused event celebrating forest appreciation and preservation. This annual event, dating back to 1950, celebrates forest appreciation and preservation. Designed by Yano Aoyama Architecture Design, the pavilion briefly hosts the Emperor and Empress before being dismantled, reflecting the festival’s theme of renewal and reuse.

Innovative Timber Structure at the Celebration
Located in Ehime, the pavilion features large-scale cross-laminated timber (CLT) panels, measuring an impressive 12 by 2.3 meters. The structural form relies on procedures like tilt, rotate, lean, taper, shift, and cut—all centered around a single repeated joint detail. This design not only serves the event’s theme but also demonstrates innovative techniques.
Three asymmetrical planes pivot around an imaginary axis, one leaning ten degrees toward the audience. This tilt pays homage to nearby Mt. Ishizuchi. The pavilion’s arrangement prioritizes ceremonial sightlines while ensuring sun protection, further aligning with the gathering’s sustainable message.

Extending Life Through Reuse
The collaboration with local carpenters and CLT manufacturers ties modern timber technology with regional traditions. The pavilion’s materials, chosen for their local significance, underscore sustainability. After the ceremony, the CLT panels are repurposed for custom furniture in regional schools, exemplifying a lifecycle approach.
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Sophisticated Design Techniques
Yano Aoyama Architecture Design Studio ensures nothing goes to waste. Cut-offs from major panels are integrated into secondary features, such as stage stairs. The pavilion not only serves its ceremonial purpose but also fosters continual use of its components, fulfilling the event’s objectives.


A Celebration of Renewed Growth
The pavilion notably aligns with the festival’s ethos: “plant, grow, use, repeat.” This message finds expression in the careful choreography of the wooden planes, embodying the cyclical nature of growth and sustainability at the gathering.



A Day of Festivity
During the festivities, the overshadowed only by the spirit of renewal it represents. The clever use of Japanese cedar and cypress allows for dynamic play with light and shadow, enhancing its visual and symbolic impact throughout the celebration.



Architectural Strategy in Action
The meticulous positioning and design techniques connect the pavilion both physically and conceptually to its surroundings, echoing the festival’s reverence for Japan’s natural world. As it stands proudly for a day, it represents a sophisticated blend of tradition and innovation, integral to the occasion.



Project Details
Name: Onodatesho Pavilion (Japan National Tree-Planting Festival)
Architect: Yano Aoyama Architecture Design
Location: Ehime, Japan
Event: National Tree-Planting Festival
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Source: designboom.com
Frequently asked questions
What materials are used in the Onodatesho Pavilion?
The Onodatesho Pavilion is crafted from regional cedar and cypress, underscoring sustainability in architecture.
How does the pavilion reflect the festival’s theme?
The pavilion reflects the festival’s theme of renewal and reuse by being dismantled after use and having its materials repurposed for custom furniture in regional schools.
What architectural techniques are used in the pavilion’s design?
The design includes large-scale cross-laminated timber panels and relies on techniques like tilt, rotate, lean, taper, shift, and cut, all centered around a single repeated joint detail.
