Otona Randosel Primêre funksje: Rêchpûde by Tsuchiya Kaban Co., Ltd.

Otona Randosel Primêre funksje: Rêchpûde by Tsuchiya Kaban Co., Ltd. is a highly esteemed winner of the very prestigious 2026 A' Design Award yn Platina in Moade- en Reisaksessoires Ûntwerp Competition Category.

PlatinaAksessoire· 2026

Otona Randosel Primêre funksje: Rêchpûde

by Tsuchiya Kaban Co., Ltd.

Client: Tsuchiya Kaban Co., Ltd.

A' Design Award yn Platina Winner in Aksessoire Category

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Colors

The Design

About Otona Randosel Primêre funksje: Rêchpûde

Boektekst: Dizze rêchpûde betinkt de tradisjonele Japanske Randosel op 'e nij foar deistich gebrûk. Troch syn karakteristike klep fuort te heljen, hat it ûntwerp in silhûet dat opboud is út rjochte linen en bochten. It ergonomyske rêchpaniel is sa struktureare dat it stipe biedt en tagelyk in formele útstrieling behâldt. De bûtenkant is ferienfâldige troch de bûsen fuort te heljen, en de iepening is opnij ûntwurpen foar maklike tagong. Dizze rêchpûde stribbet dernei om foarm te lykwichtsjen mei praktysk nut.

The Recognition

About the A' Design Award yn Platina

Otona Randosel Primêre funksje: Rêchpûde is in winner fan de A' Design Award yn Platina, in ekstreem prestisjeuze erkenning foar wier útsûnderlike, elegante en prachtige ûntwerpen. Platina-winners binne wûnders fan skepping, tsjûgenissen fan de grinzen fan yntellektuele kreativiteit, en litte it ûnevenaardige profesjonalisme en sjeny fan har ûntwerpers sjen. Fan dizze ûntwerpen wurdt ferwachte dat se de meast ferneamde wurken binne dy't de estetyk fan in tiidrek bepale, bydrage oan it wolwêzen fan de maatskippij en de grinzen fan keunst, wittenskip, ûntwerp en technology ferlegge. Otona Randosel Primêre funksje: Rêchpûde lit in transsendint nivo fan treflikens sjen en makket de wrâld sûnder mis ta in bettere plak mei syn foardielige en weardefolle skaaimerken. Otona Randosel Primêre funksje: Rêchpûde is in winnend wurk fan de A' Design Award yn Platina dat winsken wekker makket, ynspirearret, entûsjasmearret, behaachet en grutte freugde opwekket.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

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.