Super Steel (Honyaki)

  • Meet Super Steel — where tradition meets the future of Japanese knives.

    Forged in Sakai, Japan, by master artisans who inherit centuries of sword-making spirit, and elevated with cutting-edge heat treatment and material science, this semi-stainless Honyaki blade delivers extraordinary durability, effortless maintenance, and a razor-sharp edge trusted by top chefs worldwide.
    It’s more than a knife — it’s the next chapter in Japanese craftsmanship.

Super Steel (Honyaki) Japanese Knife Collection

    KIREAJI's Three Promises to You

    • japanese_knife_made_in_Sakai

      1. Forged in the Legacy of Sakai

      From Sakai City—Japan’s renowned birthplace of professional kitchen knives—each blade is crafted by master artisans with over six centuries of tradition. Perfectly balanced, enduringly sharp, and exquisitely finished, every cut carries the soul of true craftsmanship.

    • 2. Thoughtful Care for Everyday Use

      Every knife includes a hand-fitted magnolia saya for safe storage. Upon request, we offer a complimentary Honbazuke final hand sharpening—giving you a precise, ready-to-use edge from day one.

    • 3. A Partnership for a Lifetime

      A KIREAJI knife is more than a tool—it is a lifelong companion. With our bespoke paid aftercare services, we preserve its edge and beauty, ensuring it remains as precise and dependable as the day it first met your hand.

    Why Many Product Photos Show Only the Blade

    At KIREAJI, every knife is made to order in Sakai, Japan. Photos show the blade before the handle is attached, allowing artisans to perfect the balance and edge for your specific order. Your knife arrives fully finished — tailored just for you.

    Made-to-order Japanese knives

    Global Delivery from Sakai

    Across the world, discerning cooks seek authentic Japanese knives from Sakai — Japan’s legendary knife-making city with over 600 years of tradition.
    At KIREAJI, we work alongside master artisans in Sakai to fulfill that desire, shipping genuine handcrafted knives directly from the workshop to kitchens worldwide.

    Global Delivery from Sakai

    Please watch the video to see the exceptional cutting performance of Super Steel(Honyaki)

    Super Steel (Honyaki) Yanagiba(Ultra thin) 300mm -Mirror Polished(one side)
    COLLABORATION: JAPANESE FOOD TECHNOLOGY CHANNEL ON YOUTUBE

    Super Steel (Honyaki) Mukimono 180mm-Mirror Polished(both sides)
    COLLABORATION: JAPANESE FOOD TECHNOLOGY CHANNEL ON YOUTUBE

    Super Steel (Honyaki)

    • Where Craftsmanship Meets Science — What Is Super Steel (Honyaki)?

      A knife is an extension of a chef’s hand.

      When used hundreds, even thousands of times a day, it must be something you can trust.
      That is exactly what the Super Steel (Honyaki) knife is designed for.This knife is a fusion of traditional Japanese “honyaki” forging and modern metallurgy—crafted for professionals who demand the very best.
      It was developed by Shiroyama Knife Workshop, a blacksmithing studio rooted in Sakai, Japan, a city renowned for its cutlery heritage.
      Their proprietary semi-stainless steel achieves a rare balance: exceptional sharpness and ease of use in everyday kitchens.

      Shiroyama Knife Workshop 

    • Sharpness and Durability in One Blade — The Secret Lies in the Heat Treatment

      At the heart of the Super Steel knife is its advanced heat treatment process:
      Vacuum heat treatment and sub-zero processing.In vacuum heat treatment, the steel is heated in an oxygen-free environment and then rapidly cooled.
      This prevents oxidation and creates a uniform internal structure, achieving both the toughness and hardness necessary for long-lasting sharpness.Sub-zero processing follows immediately, where the steel is cooled to temperatures below freezing.
      This crucial step dramatically improves the blade’s dimensional stability and resistance to wear.

      As a result, the knife reaches an impressive HRC62±1 hardness—meaning it can be sharpened with ease, maintains its edge longer, and performs reliably even in the busiest kitchen.

      Sub-Zero Processing 

    • A Knife Trusted by Professionals

      The Super Steel knife is trusted for its cutting performance, longevity, and ease of care—even in high-demand kitchens around the world, from fine dining restaurants to bustling sushi bars.

      Its rust-resistant composition also makes it an ideal companion for passionate home cooks and culinary enthusiasts.
      It captures the elegance of traditional Japanese blades, while meeting the demands of modern cooking environments.

    • In the End, a Knife Is More Than a Tool—It’s a Partner

      Once you try it, you’ll feel the difference.
      The sound of the cut, the way the blade enters the ingredient, the tactile response—all of it transforms your connection to the food you prepare.The Super Steel (Honyaki) knife isn’t just a blade.
      It’s a partner that elevates your technique and deepens your relationship with the art of cooking.
    Where Super Steel Meets Mastery (TSUKIJI SUSHI OMAKASE)

    Recommended Users for Super Steel (Honyaki)

    • 1. Professionals Who Demand Uncompromising Performance

      Engineered with advanced heat treatment (vacuum and sub-zero), this steel delivers extreme hardness (HRC62±1) and long-lasting sharpness — perfect for chefs working in high-pressure environments like sushi bars and fine dining kitchens.

    • 2. Culinary Enthusiasts Seeking Tradition and Innovation in One Blade

      Blending the elegance of traditional honyaki forging with modern metallurgy, Super Steel offers both heritage and practicality — ideal for passionate home cooks who value authentic craftsmanship but also want rust resistance and ease of care.

    • 3. Chefs Who See Knives as Partners, Not Just Tools

      The tactile feedback, sound, and cutting experience deepen the connection to food preparation. This makes Super Steel the choice for those who view cooking as an art form and want a blade that grows with their technique.
    The Japanese Chef’s Way

    Super Steel Honyaki: Precision Engineering for the Modern Master

    • Super Steel Honyaki represents a rare fusion of traditional single-steel forging and cutting-edge metallurgical science.
      Through advanced vacuum heating and controlled sub-zero treatment, the blade achieves HRC62±1 hardness, delivering long-lasting sharpness, superior wear resistance, and reduced maintenance compared to classic carbon-steel honyaki.

      Designed for those who demand more than a tool, this steel rewards skilled professionals, passionate home cooks, and culinary artists who value authenticity, precision, and modern durability in equal measure.

    Japanese Knife Materials

    The steel behind a Japanese knife defines its sharpness, durability, and care. From traditional carbon steels like White #2 and Blue #2 to modern innovations such as Ginsan and ZDP189, each material offers its own balance of performance and maintenance. This guide explores how these choices shape the knives we use today.

    Japanese Knife Materials

    Super Steel: Where Tradition Meets Innovation

    Created by Shiroyama Hamono, Super Steel unites centuries of Japanese craftsmanship with modern technology. Known for its sharpness, durability, and corrosion resistance, it has become a favorite of professional chefs worldwide.

    Super Steel

    The Soul of Craftsmanship

    • Honoring Tradition, Embracing Change — The Spirit of Sakai Lives On

      In Sakai, where centuries-old skills still breathe in every forge, I carry forward a legacy built on craftsmanship. Yet to preserve tradition is not enough. As a craftsman, I believe it is also my duty to evolve with the times—to challenge myself, to refine my techniques, and to seek new possibilities.

    • True mastery lies in this balance—respecting the past while shaping the future. This is what allows the spirit of Sakai to endure, not as a relic, but as a living tradition, one that grows with every blade we forge.

    • Each knife we create is not only an heirloom of history but also a step toward tomorrow. And in the hands of chefs around the world, the spirit of Sakai continues to live on, bridging tradition and innovation through every cut.
    Sakai Traditional Craftsmen Collection

    A single knife can change a life

    • Forged entirely by hand in Sakai, Japan, this blade carries the legacy of traditional Japanese sword-making, elevated by generations of craftsmanship, discipline, and pride.
      With its unmatched sharpness, breathtaking beauty, and the spirit of absolute dedication, the Honyaki is more than a tool — it is the soul of the chef, a lifelong partner in the pursuit of mastery, trusted by professionals around the world.