Shirogami is another word for white #2 steel. Some also call it white paper #2 because the steel is wrapped in white paper from the steel mill named Hitatchi. These knives are reactive carbon steel and they sharpen up really easily and hold an edge pretty well. Great knives for those who want to try a good value carbon steel knife. Some of these knives have a kurouchi finish which is a black, rough finish. Others are made with a satin finish that is shiny. All of them will develop patina over time and you need to keep them dry or else they could rust.