Otona Randosel
Backpack for Tsuchiya Kaban Co., Ltd.
This backpack reimagines the traditional Japanese Randosel for daily use. By removing its characteristic flap, the design features a silhouette composed of straight lines and curves. The ergonomic back panel is structured to provide support while maintaining a formal appearance. The exterior is simplified by removing pockets, and the opening is redesigned for easy access. This backpack aims to balance form with practical utility.
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Otona Randosel by Tsuchiya Kaban Co Ltd
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Backpack by Tsuchiya Kaban Co Ltd
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Tsuchiya Kaban Co Ltd Otona Randosel
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Tsuchiya Kaban Co Ltd Backpack
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Tsuchiya Kaban Co Ltd Design Team Photo
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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.
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.
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.
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 Overview
Otona Randosel Backpack has been a Platinum winner in the Fashion and Travel Accessories Design award category in the year 2025 organized by the prestigious A' Design Award & Competition. The Platinum A' Design Award is recognized for honoring designs that stand at the forefront of creativity and innovation. It is the highest accolade bestowed by the A' Design Awards, acknowledging works that blend remarkable innovation with impactful societal contributions. These designs not only showcase exceptional artistic and technical proficiency but also highlight their creators' commitment to advancing the boundaries of art, science, design, and technology. Recipients of this award are celebrated for their role in shaping the aesthetics and trends of our time, contributing significantly to the enhancement of quality of life and promoting sustainable development.
Image Credits
For design images and photos please credit Tsuchiya Kaban Co., Ltd..
Platinum Recognition
Tsuchiya Kaban Co., Ltd. was recognized with the coveted Platinum A' Design Award in 2026, a testament to excellence of their work Otona Randosel Backpack.
Tsuchiya Kaban Co., Ltd. Newsroom
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