Large Deba knife by Ittetsu has 240 mm forge-welded blade made of Shirogami #2 carbon steel. Weight is 700 g. The oval shaped handle is made of magnolia wood. Carbon steel is susceptible to rust and must be kept dry and clean at all time’s to avoid oxidation and discoloration. Hand wash with warm water and towel dry. Ittetsu knives are handmade in Echizen city, Japan.