The kitchen knife in question originates from Tsubame-Sanjo, Niigata Prefecture, renowned for its expertise in metalworking. It is aptly referred to as the "black finished knife" due to its unique manufacturing process. Instead of completely shaving the entire blade, only the tip undergoes shaving, resulting in the presence of an oxide film, which gives the blade its distinct black appearance.
This oxide film contributes to the knife's well-earned reputation for exceptional rust resistance. By retaining the oxide film, the knife's durability is enhanced, making it highly reliable even in humid or wet conditions. This quality makes the black finished knife a preferred choice among discerning chefs and culinary enthusiasts who value both performance and longevity in their kitchen tools. With its excellent resistance to rust, this knife ensures a lasting and reliable cutting experience, making it a valuable addition to any cook's arsenal.