What steels does Shigeki Tanaka use?

Shigeki Tanaka makes his knives under the maker brand Shigeki-saku (誠貴作). Miki's official product listing records his steel palette as Blue #2 (青紙2号), including an eight-layer-per-side clad steel, along with powdered stainless, Ginsan #3, VG10, VG10 laminate, and a sixteen-layer stainless laminate. His life motto, recorded on Miki's maker profile, is 質実剛健.