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Otona Randosel Primary Function: Thumba la Kumbuyo by Tsuchiya Kaban Co., Ltd.
Otona Randosel Primary Function: Thumba la Kumbuyo by Tsuchiya Kaban Co., Ltd.
Otona Randosel Primary Function: Thumba la Kumbuyo by Tsuchiya Kaban Co., Ltd.
Otona Randosel Primary Function: Thumba la Kumbuyo by Tsuchiya Kaban Co., Ltd.
Otona Randosel Primary Function: Thumba la Kumbuyo by Tsuchiya Kaban Co., Ltd.

Platinamu Chowonjezera · 2026

Otona Randosel Primary Function: Thumba la Kumbuyo

by Tsuchiya Kaban Co., Ltd.

  • Mphoto ya Platinamu ya A' Design Award 2026 in Chowonjezera
  • 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 Primary Function: Thumba la Kumbuyo

Book Text: Thumba ili la kumbuyo limasinthanso Randosel yachikhalidwe ya ku Japan kuti igwiritsidwe ntchito tsiku ndi tsiku. Pochotsa chivindikiro chake chodziwika bwino, mapangidwewa amasonyeza maonekedwe opangidwa ndi mizere yowongoka ndi mizere yopindika. Bolodi yakumbuyo yopangidwa moganizira za thupi imamangidwa kuti ipereke chithandizo pomwe ikusunga maonekedwe abwino. Kunja kwake kuli kosavuta pochotsa matumba ang'onoang'ono, ndipo malo otsegulira amapangidwanso kuti azitha kufikiridwa mosavuta. Thumba ili la kumbuyo likufuna kuyanjanitsa maonekedwe ndi kugwiritsa ntchito kwenikweni.

About the Mphoto ya Platinamu ya A' Design Award

Otona Randosel Primary Function: Thumba la Kumbuyo ndi mmodzi mwa opambana a Mphoto ya Platinamu ya A' Design Award, kuzindikirika kolemekezeka kwambiri komwe kumaperekedwa kwa mapangidwe apadera kwenikweni, okongola ndi aulemerero. Opambana a Platinamu ndi zodabwitsa za kulenga, umboni wa malire a nzeru za anthu, ndipo amaonetsa ukatswiri wosayerekezeka ndi luntha la opanga awo. Mapangidwe amenewa akuyembekezeka kukhala ntchito zotchuka kwambiri zomwe zimatsimikizira kukongola kwa nthawi yawo, kuthandiza ubwino wa gulu ndi kukulitsa malire a luso, sayansi, kapangidwe ndi ukadaulo. Otona Randosel Primary Function: Thumba la Kumbuyo amaonetsa mlingo wapamwamba wa ubwino ndipo mosakayikira amasandutsa dziko kukhala malo abwino kwambiri ndi makhalidwe ake opindulitsa ndi amtengo wapatali. Otona Randosel Primary Function: Thumba la Kumbuyo ndi ntchito yopambana Mphoto ya Platinamu ya A' Design Award yomwe imadzutsa zilakolako, imalimbikitsa, imasangalatsa ndi kubweretsa chisangalalo chachikulu.

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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