There are moments when an object is asked to represent something greater than itself.

In June 2026, the national organization representing Japan’s sushi professionals — the All Japan Sushi Association — will hold its national championship. The winners will receive, as a symbol of their achievement, a Japanese knife crafted by Shiroyama Knife Workshop. in Sakai and presented through KIREAJI.

Not a trophy.
Not a medal.
A knife.

We believe this choice reveals something important about Japanese sushi culture — and about the role a knife holds within it.

At its core, sushi is a discipline of the blade.

The texture of fish, the beauty of a cut surface, and even the way flavor is released depend directly on the precision of the cut itself. A great sushi chef is, in many ways, someone who has devoted years to mastering the movement of a knife.

When Japan’s national sushi competition chose a knife to honor its champions, it was not choosing an accessory. It was choosing the very tool through which a sushi chef’s skill is expressed.

And when it chose a knife from Sakai — Japan’s historic center of knife craftsmanship — it was also recognizing the cultural tradition behind that blade.

Every piece within the Sakai Cultural Works collection is shaped through the collaboration of specialists whose skills have been refined over decades.

The blade is forged by Traditional Craftsman Shogo Yamatsuka, a master known for his exceptional work with Ginsan steel.

The sharpening is completed by Traditional Craftsman Mitsuo Yamatsuka, whose pursuit of ideal sharpness reflects Sakai’s long sharpening tradition.

The handle is crafted by Toshiyuki Terauchi, an artisan known for elevating Japanese handle craftsmanship into an expression of beauty and refinement.

Three specialists.
Three lifetimes of focused dedication.
One cultural work.

This division of labor has defined Sakai craftsmanship for centuries. Rather than mastering every stage superficially, each artisan devotes an entire lifetime to a single discipline. The result is a depth of craftsmanship impossible for any one individual to achieve alone.

The works within Sakai Cultural Works are not distributed through conventional retail channels.

They are presented exclusively through KIREAJI as exceptionally limited cultural pieces created for those who deeply appreciate Japanese craftsmanship, sushi culture, and Sakai’s knife-making tradition.

This exclusivity is not a marketing strategy. It is simply the natural result of creating works at this level.

A knife chosen to represent Japan’s highest sushi competition cannot be treated as a mass-produced object. It is created through time, concentration, and decades of accumulated skill. Genuine mastery cannot be accelerated.

These works are meant not only to be used, but also to be understood — as objects carrying the philosophy, aesthetic sensibility, and cultural legacy of Sakai craftsmanship.

In Japanese knife culture, attention is often focused entirely on the blade itself.

But true completion lives in the harmony of the entire object.

The balance between blade and handle, the refinement of materials, the precision of proportion, and the quiet elegance of the final finish all shape the presence of the knife as a cultural work.

The performance lives in the blade.
The completeness lives in the whole.

KIREAJI exists to connect Sakai’s craftsmanship with people around the world who seek to truly understand Japanese knife culture.

The Sakai Cultural Works collection represents the highest expression of that mission — works that embody the spirit of Sakai’s division of labor, the mastery of Traditional Craftsmen, and the cultural depth of Japanese culinary tradition.

That these works were chosen to honor Japan’s finest sushi professionals is something we consider deeply meaningful.

We are honored to present them to the world with the care and respect they deserve.