Soroban Colette Abakusi by Toshihiko Sakai

Soroban Colette Abakusi by Toshihiko Sakai is a highly esteemed winner of the very prestigious 2025 Moputso oa Boronse oa A' Design Award in Moralo wa Disebediswa tsa Bonono le Disebediswa tsa Ofisi Competition Category.

BoronseDisebediswa tsa Bonono· 2025

Soroban Colette Abakusi

by Toshihiko Sakai

Client: Asahi Printing Co., Ltd.

Moputso oa Boronse oa A' Design Award Winner in Disebediswa tsa Bonono Category

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Colors

The Design

About Soroban Colette Abakusi

Ka nako e fetileng, abakusi e ne e na le dikhutlo tse thetseng, empa e hlahisitswe hape e na le moralo o bonolo haholwanyane o nang le dikhutlo tse kobehileng e le hore bana ba ka e sebedisa ntle le tshwenyeho ea ho senya ntho ka yona. Moralo ha o sebedise dikhuruso, dinale kapa sekgomaretso, ho etsa hore e be sehlahiswa se bolokehileng bakeng sa bana ba bannyana haholwanyane. Ka lebaka la mefuta e mengata ea mebala eo bana ba e ratang, dikgetho di atile. Ho feta moo, palo ea dikarolo e fokotsehile ka 40%, ho etsa hore tlhahiso e be bonolo ebile e sebetse hantle haholwanyane.

The Recognition

About the Moputso oa Boronse oa A' Design Award

Soroban Colette Abakusi ke mohapi oa Moputso oa Boronse oa A' Design Award, kananelo e hlomphehang haholo e fuoang meralo e ikhethang e tsejoang ka boqapi, bohlale ba ho qapa le bohlale. Bahapi ba Boronse ke lintho tse nang le bokhoni ka ho felletseng le boqapi bo hlollang tse tiisang boiphihlelo bo bongata, mohopolo le bokhoni ba ho iphumana ba baqapi ba tsona. Soroban Colette Abakusi e lebelletsoe ho ba ntho e hlomphuoang haholo, e ratoang le e ratehang, e nang le boprofeshenale bo bonahalang le mehopolo e mecha. Moralo ona o hapileng Moputso oa Boronse oa A' Design Award o kenyelletsa mekhoa e metle ka ho fetesisa bonong, mahlaleng, moralong le theknolojing mme o hlahella ka ho tsepamisa maikutlo lintlheng tse nyenyane. Soroban Colette Abakusi e kutloisisa litlhoko hantle, e ama litakatso, e hapa maikutlo mme e tsosa takatso ea ho tseba.

Behind the Design

Press Kit

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

Unique Properties: Previously, the abacus had square corners, but it has been reborn to gentler design having rounded corners so that children can use it without worrying about damaging something with the item. The design does not use screws, nails, or adhesive, making it a highly safe product for younger children. By having a variety of colors that children like, the options have expanded. Additionally, the number of parts has been reduced by 40%, making manufacturing simpler and more efficient.
Dimensions & Packaging: "Traditional abacuses were mostly 23 digits, but this product has 20 digits, making it ideal for beginners. As a result, it is now A4-sized and can be stored neatly in a school bag.

The main body is made of resin, which is stably supplied, and the weight as well as the size are similar to those of conventional products.

Number of digits: 20
Material: main body from recycled polycarbonate, beads from polystyrene
Package: paper box with a cover case
Weight: 158g
Length 60mm x width 283mm x height 17mm"
Tags: pop, colette, eco, 20 digit, colorful
Production Technology: Traditionally, abacuses were made from hard, heavy wood such as boxwood, which are endangered species and hard to obtain. Over 60% of the product weight is of upcycled materials. By integrally molding the beam and shaft parts like a fishbone, we succeeded in reducing the number of parts by more than 30% compared to conventional products. With all the efforts combined, we have established manufacturing that does not rely too much on individual craftmen.
Design Challenge: A modern arrangement has been added without disrupting the traditional use of the abacus. Additionally, since it will be used by children, we aimed for a safe design with no angular corners and no screws or nails. The most time-consuming task was to come up with a frame structure that integrated the beam and shaft in order to reduce man-hours. In terms of materials, from a sustainability perspective, we had to maintain enough strength while using recycled resin, which was a challenge.
Research: The traditional manufacturing of abacuses is a cottage industry, involving nearly 200 steps, each of which is highly specialized, requiring a large number of workers to manufacture one abacus.

Due to the decrease in successors, the production volume has dropped to about 150,000 per year, about one-twentieth from the peak of 3 million abacuses, making it difficult for abacus schools to secure the necessary quantities.

In addition, the raw material ebony is dependent on imports, and domestic boxwood is rated as endangered on the Fukuoka Prefecture Red List, making it depleted and in need of protection.
Inspiration: The abacus was introduced to Japan as calculator 450 years ago, and is popular even today as a traditional skill learning and brain training for children. However, as the design variations are limited because it is made of wood and traditional manufacturing process, children are currently unable to choose one that suits their preference. Manufacturing sites are facing problems such as aging of craftsmen, lack of successors, and less materials, and this shows the possibility that traditional abacus education will be reduced due to the shortage of abacuses, “sorobans” in Japanese. It is also required that newly developed products are eco-friendly.
Project Duration: The project was started in January, 2021, and was completed in April, 2024, It took 3 years for us to reserch and realize an ideal product.
Operation Flow: An abacus is designed to make it easy to understand the decimal system, with each column representing one digit. The thing that runs horizontally and divides the bead into one and four parts is called a beam. The beads at the top of it are called 5-beads, and correspond to five beads at the bottom. Use your thumb to move a 1-bead, and your index finger to move the rest. With this small abacus, users can add, subtract, multiply, and divide.
Patents: Patent applied
Patent application 2023-176919
Team Members: Toshihiko Sakai
Image Credits: N/A