Yoshio Sugiyama--- Custom Knives Inspired by an Engineer’s Perspective

Yoshio Sugiyama is a Japanese custom knife maker and the founder of handmade labo Kashima BASE. A member of the Japanese Knife Guild (JKG), he began his career as a structural engineer specializing in seismic bridge design before dedicating himself to custom knife making.

His engineering background continues to shape the way he approaches every knife. Rather than focusing solely on appearance, Sugiyama carefully considers ergonomics, weight distribution, structural balance, and real-world usability. Each knife is designed not only to be admired, but to perform as a reliable tool.

Beyond the world of custom knives, Sugiyama draws inspiration from a wide range of interests, including outdoor activities, leathercraft, cooking, and even anime and cosplay. True to its name, handmade labo Kashima BASE is more than just a workshop—it serves as a creative laboratory where new ideas are explored and the possibilities of knife making continue to evolve.

His work reflects both the precision of an engineer and the sincerity of a craftsman. By combining traditional Japanese craftsmanship with a modern product-design mindset, Sugiyama creates knives that are visually refined while remaining highly functional.

For Yoshio Sugiyama, a knife is more than a cutting tool. It is the result of thoughtful design, careful craftsmanship, and a constant pursuit of better functionality. That balance between engineering logic and handcrafted artistry is what makes his work truly distinctive.