The Japanese Knife Evangelist 3-18

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Two steels, two philosophies—find the blade that fits your craft.

Blue Steel is one of the most respected steels in Japanese knifemaking, prized by chefs around the world for its unmatched combination of sharpness, edge retention, and durability. Within this category, however, two distinct types—Blue Steel #1 and Blue Steel #2—offer unique qualities that make them better suited for different chefs, kitchens, and skill levels.

Blue Steel #1 carries a higher carbon content, enabling it to reach greater hardness and sustain razor-sharp edges for longer periods. It is the steel of choice for chefs who demand ultimate performance, especially in precise, delicate work. Yet this strength comes with challenges: greater difficulty in sharpening, higher risk of chipping, and the need for careful maintenance.

Blue Steel #2, in contrast, offers a more balanced experience. With slightly lower hardness, it is easier to sharpen, more forgiving in daily use, and still provides excellent edge retention. This makes it an ideal choice for professional chefs who need reliability in fast-paced kitchens, as well as serious home cooks who value both sharpness and practicality.

At KIREAJI, while we do produce a limited number of Blue Steel #1 knives, many of our chefs favor Blue Steel #2 for its versatility and consistency. A well-made Blue Steel knife, however, is never about steel alone—it is also about the artisan. True quality reflects not just the material, but the dedication of the blacksmith and sharpener behind it.

In the end, choosing between Blue Steel #1 and Blue Steel #2 is not about which is “better,” but which aligns with your style and skill. Both carry the spirit of Japanese craftsmanship, and whichever you select, your Blue Steel knife will be more than a tool—it will be a lifelong partner in your culinary journey.