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Otona Randosel Zaino by Tsuchiya Kaban Co., Ltd.
Otona Randosel Zaino by Tsuchiya Kaban Co., Ltd.
Otona Randosel Zaino by Tsuchiya Kaban Co., Ltd.
Otona Randosel Zaino by Tsuchiya Kaban Co., Ltd.
Otona Randosel Zaino by Tsuchiya Kaban Co., Ltd.

Platino Accessorio · 2026

Otona Randosel Zaino

by Tsuchiya Kaban Co., Ltd.

  • A' Design Award di Platino 2026 in Accessorio
  • CLIENT: Tsuchiya Kaban Co., Ltd.
  • Estimated Number of Design Views: 924,743
  • Verification code C8FCD5BD73 · Verify this award
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About Otona Randosel Zaino

Questo zaino reinventa il tradizionale Randosel giapponese per l'uso quotidiano. Eliminando la sua caratteristica patta, il design presenta una silhouette composta da linee rette e curve. Lo schienale ergonomico è strutturato per offrire supporto mantenendo al contempo un aspetto formale. L'esterno è semplificato rimuovendo le tasche e l'apertura è ridisegnata per un accesso agevole. Questo zaino mira a bilanciare la forma con l'utilità pratica.

About the A' Design Award di Platino

Otona Randosel Zaino ha vinto l'A' Design Award di Platino, un riconoscimento estremamente prestigioso conferito a design davvero eccezionali, eleganti e magnifici. I vincitori di Platino sono meraviglie della creazione, testimonianze dei limiti della creatività intellettuale, e dimostrano l'impareggiabile professionalità e la genialità dei loro designer. Ci si aspetta che questi design siano le opere più rinomate, che definiscono l'estetica di un'epoca, contribuiscono al benessere della società e fanno avanzare i confini dell'arte, della scienza, del design e della tecnologia. Otona Randosel Zaino mostra un livello di eccellenza trascendente e rende inequivocabilmente il mondo un posto migliore grazie alle sue caratteristiche vantaggiose e preziose. Otona Randosel Zaino è un'opera premiata con l'A' Design Award di Platino che risveglia i desideri, ispira, entusiasma, delizia e suscita grande gioia.

Press Kit

Unique Properties
Reimagining Randosel features for modern daily life.
This backpack reconstructs the "beauty of straight lines and curves" unique to Japanese Randosel. By removing the iconic flap, we achieved a minimalist silhouette defined by clean lines. Ergonomic curves on the back ensure comfort, balancing formal tension with utility. We eliminated external pockets to increase purity while redesigning the opening for smoother access. Disciplined beauty and modern convenience are highly fused.
Dimensions & Packaging
Size: H 410 × W 295 × D 120 mm
Shoulder Strap Length: 670-880 mm (7-level adjustment)
Handle Height: 35 mm
Tags
RANDOSEL, Backpack, Leather, Japan, Minimalist, Craftsmanship, Repairable
Production Technology
We developed a unique magnet for smooth operation and secure closure. Based on children’s Randosels-curves, we tested 4 shapes and 3 lengths, refining the fit through trials with over a dozen people. We also inherited the "soft touch" technique of Randosel by slightly extending the side cushioning.
For the lower back, a three-layer sponge supports weight on the hips. By incorporating the traditional airflow channel design into the back panel, we significantly improved daily comfort.
Design Challenge
Our challenge was to overturn the stereotype of "RANDOSEL equals a children’s bag" by reinterpreting it as a backpack with formal dignity. We achieved refined form and rational structure by fusing our founding Randosel techniques with top-tier craft, such as Dulles bag manufacturing and repair expertise. Working closely with our craft people, we thoroughly examined core materials, hardware, and aging quality, completing a unique product that integrates safety and durability with beauty.
Research
Inheriting and updating design and technology rooted in the Randosel.

Since our founding in 1965, we have inherited our craft while updating it for modern life. We thoroughly examined structure and specifications, focusing on flap operation, formal refinement, and carrying comfort. Beyond aesthetics, we pursued practical weight reduction and accessibility. Staying true to our brand spirit, we optimized the "OTONA RANDSEL" for daily use, achieving a fusion of beauty and functionality.
Inspiration
This project is based on the craftsmanship of the "RANDOSEL"-a traditional Japanese school bag-honed since our founding in 1965. We reconstructed the model launched for our 50th anniversary, evolving it into a backpack for a modern daily lifestyle. While inheriting the elegance, carrying comfort, and robust box-shaped structure, we pursued refined functional beauty to create an iconic model to be appreciated not only in Japan but also in the international market.
Project Duration
Started in July 2019 at Tsuchiya Kaban in Tokyo. Mass production was completed at the Tsuchiya Kaban workshop in June 2023, marking the end of the project. It is currently not for sale.
Operation Flow
Elevating the backpack into a dignified form suitable for formal settings.
By reinterpreting the Randosel’s neat structural beauty, we elevated the casual backpack into a dignified form. We added asymmetrical details to the orderly boxy form to create a presence that stands out in daily life. With center-of-gravity design and structure, we balanced a beautiful silhouette with high-performance comfort. This new commuter backpack integrates casual style and dignity, enhancing the wearer’s posture.

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