The Japanese word Gyuto (牛刀) literally translates to beef sword. The gyuto is the equivalent of the Western chef's knife, and is designed to cut everything: vegetables, meats and fishes. It is made to be used with the push-cut method, lifting the blade between each cutting motion, or with the rocking motion method. It is important that the blade is straight upon impact with the cutting board to avoid damage to the knife edge.
The Aogami #1 by Hitchachi steel co translates to blue steel #1. It was named after the color of the paper in which the steel is packaged at Hitachi steel co. This steel has the same carbon content as Shirogami #1 (1.25-1.3%), but in addition tungsten and chromium are added to the composition. This improves corrosion resistance, wear resistance and cutting edge retention. It is considered by many to be the best steel for single bevel blades.