3 crafts, 3 passions, 1 knife

De Librije • Jonnie Boer


2015, a new restaurant, new courses, new ideas.

“In search of our own ultimate steak knife, sharpening shop Slijperij J.M. van Rangelrooij put me in contact with the blade craftsmen of Ryusen Hamono. Robust, sturdy and sharp are the qualities that are melted into my steak knife. Completely handcrafted by highly skilled artisans. This knife adds an extra dimension to the overall experience of the steak dish.”




Ryusen Hamono


Ryusen has been forging kitchen knives since 1953 according to traditional methods dating back to more than 700 years, in the Echizen region of Japan. During the past few years Ryusen has developed a unique method of forging, stropping and hardening steel, and thus making the creation of the Ryusen Hamono steak knife a reality. The unique Ryusen- rin pattern on the blade is created by forging core-less vg10 and vg2 steel and by producing a razor-sharp edge after the stropping. Because of its unparalleled cutting qualities it is the quintessential table knife.

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Slijperij J.M. van Rangelrooij


The combination of steel grade, hardness and the edge angle not only determines the sharpness of a knife but also how long the knife will remain keen, according to Elwin de Veld. Knowledge and expertise in his sharpening shop has been passed on from generation to generation since 1894 and the sharpening of knives has been elevated to a true art form.





“He who works with his hands is a laborer.

He who works with his hands and his head is a craftsman.

He who works with his hands and his head and heart is an artist.”

St. Francis of Assisi


De Librije, Slijperij J.M. van Rangelrooij & Ryusen Hamono

A collaboration of three pure crafts, Jonnie Boer, Slijperij J.M. van Rangelrooij and Ryusen Hamono knife makers. Three times craftsmanship with a single purpose: the ultimate steak knife for the table. The Librije in collaboration with Slijperij J.M. van Rangelrooij has elaborated an exceptional steak knife at Ryusen Hamono in Japan, exclusively with the name of Jonnie Boer. The result: a robust steak knife with a rosewood handle and a blade of the finest Japanese Damascus steel, keenly sharpened.


The Jonnie Boer steak knife is available at selected stores. Email us for more information.


“This knife adds an extra dimension to the overall experience of the steak dish.”


Jonnie Boer

Chef and owner of the acclaimed De Librije restaurant in Zwolle which has been awarded three Michelin stars.

The perfect steak knife!

The Jonnie Boer steak knife is handcrafted at Ryusen Hamono in the Echizen province of Japan. A sturdy steak knife with a rosewood handle and a keenly sharpened blade of the finest Japanese Damascus steel. This exquisite steak knife with unparalleled cutting qualities is make of 70 layers of Damascus VG10/VG2 core-less steel. This Uchihamono (Japanese) casting method dates back more than 700 years and is only applied by Ryusen Hamono.

It is with great pride that we present you with your perfect table partner. A knife that brings out the best from your kitchen.

New: the quintessential chef’s knife

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