About Masamoto Swedish Steel The KS Series is Masamoto’s range of high-grade Sweden Stainless Steel Japanese traditional-style knife. Masamoto KS Series Wa Gyuto is completely hand sharpened, polished and finished by especially skilled and experienced craftsmen, which results in extra edge sharpness and a more refined level of finish.This line is highly recommended for those who enjoy knives with a traditional Japanese handle. About Masamoto Minosuke Matsuzawa, the founder of the Masamoto Sohonten Company started making knives in 1866. It was his dream that his family would come to be remembered as knife craftsmen throughout the generations. Now, five generations later, Matsuzawa’s vision has been realized and professionally crafted Masamoto knives have become widely regarded as the finest knives made for professional use. Purpose of Gyuto The Gyuto is a versatile chef's knife. It can be used for cutting meat, fish and vegetables, making it suitable for preparing Western cuisine. Lightweight and thin, Japanese chef knives have a sharper blade and maintain their sharpness longer than most other chef knives.