Perfect petty knife for those who want a knife that is affordable, sharp and super easy to maintain. Gold Forging Gold steel is the highest quality in the stainless class providing a super sharp edge. The VG-Gold Steel is forged with soft iron on both sides of the blade making it easy to sharpen and maintain. Bolster will not deteriorate even with prolong use. Strong stain resistant steel. Whetstone is recommended for sharpening. -About YOSHIHIRO- "YOSHIHIRO" has been designated as a one of the Best Sword Craftsman in Japan since 1550. Over 500 years of their sword making history and technique achieves one of "Best Sushi Chef Knife Maker" in Japan.