Super Steel: The Japanese Craftsmanship That Captivates Professional Chefs

  • March 15, 2025

  • In the world of traditional Japanese knives, steels like Ginsan and ZDP189 are widely known, but recently, the steel that has captured the attention of professional chefs worldwide is "Super Steel", proudly developed by Shiroyama Hamono Manufacturing.

  • This special semi-stainless steel contains rich amounts of molybdenum, chromium, and tungsten, offering high corrosion resistance, outstanding durability, and an excellent balance between sharpness retention and ease of sharpening. But the true allure of Super Steel lies not just in its technical properties—it is a fusion of traditional Japanese craftsmanship and cutting-edge technology, making it truly one-of-a-kind.

  • Craftsmanship in Every Step of Production

  • The unique qualities of Super Steel are unlocked through a meticulous production process. Two innovative techniques, vacuum heat treatment and sub-zero treatment, set this steel apart from any other.

  • Vacuum Heat Treatment:

    By heating and rapidly cooling in a vacuum environment, this process prevents oxidation and results in uniform hardness and strength, ensuring that the knife maintains consistent sharpness over time and retains its form, no matter how long it's used.

  • Sub-Zero Treatment:

    This treatment involves cooling the steel to sub-zero temperatures after heat treatment, enhancing hardness and improving dimensional stability. The result is a knife that performs excellently even under the most demanding conditions, meeting the exacting standards of professional chefs.

  • Performance That Professional Chefs Swear By

  • Knives made from Super Steel have earned high praise from chefs worldwide due to their exceptional sharpness and durability.

  • Incredible sharpness and longevity:

    Achieving an impressive HRC 62±1 hardness, these knives retain their sharpness for an extended period, allowing for easy sharpening and use over the long term.

  • Outstanding corrosion resistance:

    Super Steel is resistant to rust, making maintenance simple and ensuring the knife stays clean and hygienic even in the busiest kitchens.

  • Consistent quality:

    By combining traditional craftsmanship with modern technology, Super Steel offers consistent high quality and reliability, making it a trusted tool in the hands of professional chefs.

  • A True Masterpiece of Japanese Tradition and Innovation

  • Super Steel is a perfect blend of Japan’s traditional blade-making techniques and the most advanced technologies. It represents the pinnacle of craftsmanship—a tool that not only performs exceptionally but also inspires creativity and passion in chefs around the globe.

  • This knife is more than just a kitchen tool—it’s an extension of the chef’s hands, breathing life into every dish. As Japan’s knife culture evolves to new heights, Super Steel leads the way, embodying both tradition and innovation. It will continue to be beloved by chefs worldwide, elevating their craft and inspiring them for generations to come.

Super Steel (Honyaki)

The collection showcases Super Steel (Honyaki) knives, known for their sharpness and durability. Crafted by Sakai City craftsmen, these knives are favored by chefs for their quality and craftsmanship.

Super Steel (Honyaki)

Material of Knife

By introducing the materials used in knives, we aim to help customers understand the quality and performance of knives, enabling them to find the perfect knife that meets their needs and preferences.

Japanese Knife Materials

The Origin of Craftsmanship

  • A Craftsman's Words: Reflecting on the Essence of Traditional Craftsmanship

  • The passion we put into our work breathes life into every step of the process. As craftsmen, no matter how tough the road ahead, we always believe that 'somehow, it will work out.' This phrase isn't just about optimism; it carries the confidence born from experience and belief. No matter how challenging the task, by working with dedication and persistence, the results will surely come. This is the power of tradition, and it’s what we, as craftsmen, have learned and honed over time.

KIREAJI's Three Promises to You

  • japanese_knife_made_in_Sakai

    1. Exceptional Japanese Knives

    Our knives, crafted by Sakai City's master artisans, combine traditional techniques with carefully selected materials, delivering unrivaled sharpness and durability.

  • Honbazuke

    2. Genuine Sharpness

    We offer free Honbazuke sharpening performed by skilled craftsmen, ensuring that you experience the authentic sharpness of a true Sakai knife.

  • 3. Lifetime Knife Use

    Each knife comes with a free Saya (protective sheath) for added durability. We also offer after-sales service through a trusted Sakai City workshop to maintain your knife's performance.