Jikko's Nihonkou series are forged with a hard Japanese carbon tool steel (hagane) and soft iron backing (jigane). They have a plastic ferruled Japanese magnolia handle. They are a basic entry level series single bevel knife, great for home cooks or those on a budget. They are not stainless, so extra care should be taken in drying the knife to avoid rust.
Jikko was established in 1901 in Sakai City Osaka and has extensive relationships with traditional craftsman in Sakai. From basic to top shelf Jikko knives are always sent sharpened by hand with with nice work done on the edges with special care to provide a flat fine polished ura (side opposite omote bevel).