Naohito Myojin - Cobalt Special 210mm GyutoOur Comment The Naohito Myojin Cobalt Special 210mm Gyuto features a partial kasumi finish on top of a migaki finish, resulting in a sleek and shiny surface with an elegant look. The slightly concave, almost flat bevels are very thin behind the edge, creating small secondary bevels that experience minimum pressure at the cutting edge. Edge retention: Poor Average Good Great Excellent Corrosion Maintenance: Low Average High Specifications Blade Length: