The KB line of scissors is made of Hitachi Steel. Hitachi Metals [https://www.hitachi-metals.co.jp/e/yss/index.html] and Aichi [https://www.aichi-steel.co.jp/ENGLISH/about/location.html] are the top quality specialty steel manufacturers that gave Japanese steel its reputation as “Number 1 Specialty Steel” in the world. Aichi was established in 1940 and Hitachi in 1956.
Beware if some overseas companies that print “Hitachi” on their shears that are not made of Hitachi steel. There are ways of finding fraudulent companies that claim to use Hitachi Metals. The easiest way, but not the surest way, is the price; high quality steel is costly to manufacture. However, buyers beware of companies that unnecessarily tremendously overcharge for salon shears. Hitachi and Aichi are the best manufacturers of Japanese Steel. Beware of “Super Japanese Steel” and “High Molybdenum” Japanese steel; they are neither Hitachi nor Aichi and sometimes priced at double the cost.