Hatsu Tomoe-ha Couteau de cuisine by Kairi Eguchi

Hatsu Tomoe-ha Couteau de cuisine by Kairi Eguchi is a highly esteemed winner of the very prestigious 2025 A' Design Award d'Argent in Ustensiles de Cuisine Competition Category.

ArgentUstensiles de Cuisine· 2025

Hatsu Tomoe-ha Couteau de cuisine

by Kairi Eguchi

Client: Hatsu

A' Design Award d'Argent Winner in Ustensiles de Cuisine Category

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The Design

About Hatsu Tomoe-ha Couteau de cuisine

Hatsu Tomoe-ha est un couteau de cuisine qui réunit en une seule lame les fonctions d'un couteau universel et d'un couteau d'office. La lame est découpée au laser dans un acier inoxydable résistant à la corrosion, puis affûtée pour offrir un tranchant durable. Elle mesure 40 mm de largeur à sa base et s'affine vers la pointe. Le manche est réalisé en bois de hônoki (magnolia), ce qui rend le couteau léger et compact. La forme du manche facilite l'application de la force, permettant ainsi aux cuisiniers débutants de l'utiliser en toute aisance. Ses dimensions réduites conviennent aux cuisines exiguës et lui permettent de tenir sur une planche à découper.

The Recognition

About the A' Design Award d'Argent

Hatsu Tomoe-ha Couteau de cuisine est lauréat de l'A' Design Award d'Argent, une reconnaissance énormément prestigieuse décernée à des designs haut de gamme, superbes et impressionnants. Les lauréats Argent sont des œuvres tout à fait brillantes et extrêmement créatives qui illustrent l'expertise, le talent et la perspicacité remarquables de leurs concepteurs. Hatsu Tomoe-ha Couteau de cuisine est censé être une œuvre merveilleuse, une vitrine de savoir-faire, remarquablement professionnelle et profondément innovante. Ce design lauréat de l'A' Design Award d'Argent est une invention très notable et admirée, qui sert l'art, la science, le design et la technologie et en repousse les limites. Hatsu Tomoe-ha Couteau de cuisine est une création très enviée qui éveille les désirs, apporte des sentiments positifs et suscite émerveillement et étonnement.

Behind the Design

Press Kit

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

Unique Properties: Tomoe-ha is a kitchen knife that incorporates the dual usage of an all-purpose knife and a paring knife into one single utensil. It is made for people who are starting to live alone or for those who want to enjoy cooking with their children. Especially in countries with small living quarters like Japan,
having a simple yet highly functional mini kitchen knife makes cooking in a limited kitchen space more enjoyable. Tomoe-ha enables the user for an easier daily cooking routine and sustains that lifestyle for a longer period of time.
Dimensions & Packaging: W225×D18×H40mm. Blade length: 130mm
Tags: Japanese, sharperner, knife, handcrafted, blade
Production Technology: Steel is laser-cut to take its unique shape and then sharpened to turn into a working blade. The blade is made of rust-resistant stainless steel (locally termed as
"VG7") for long-lasting sharpness. The handle is manufactured by a woodworks company specializing in making knife handles for Echizen blades. Made from Hoonoki wood, it makes the handle light and compact. The overall shape of the handle makes it easy to apply force, so that even first-time cooks can use this
knife with ease.
Design Challenge: Finding the right balance between an all-purpose knife and a paring knife. In the end, we end up with a blade with a new kind of shape that has not existed before in any kitchen knives.
Research: The shape of the hybrid blade is the result of comparing the shapes and sizes of various small Santoku knives and a petty knives. In order to be used for both functions, we came up with a blade width of 40 mm at the base and a narrower blade towards the tip.
Inspiration: The Tomoe-ha mini kitchen knife combines the best features of the small Santoku knives (all-purpose knives) and petty knives (paring knives). The Japanese characters used for the name "Tomoe-ha” means ‘having two characteristics in equal measure,’. The characteristics of the small Santoku knife (used for cutting big things) and the petty knife (used for cutting vegetables) represents the idea of Tomoe-ha by incorporating both functionality into a knife that bears a single blade.
Project Duration: Manufacturing was done in Echizen City, Fukui Prefecture. Design was done in Osaka, with frequent visits to Fukui Prefecture for quality control.
Operation Flow: Tomoe-ha fits the right size to use for cutting fruits and sliced cabbages for quick and easy cooking. It is also small enough to fit on a cutting board, making it easy to use in a compact kitchen, thus making the daily routine of cooking easier for the user.
Team Members: Designer: Kairi Eguchi
Image Credits: #1 Kairi Eguchi (Product Designer) Yuma Ono (Assistant Designer), Main Image, 2024. #2 Kairi Eguchi (Product Designer) Yuma Ono (Assistant Designer), Zoom-in, 2024. #3 Tsutomu Ogino (Photographer), Kiwi, 2024. #4 Tsutomu Ogino (Photographer), Carrot, 2024.