Fujiwara Teruyasu:

In the knife world Fujiwara needs no introduction and is known for handmade, razor sharp knives.

About Fujiwara: Fujiwara is a Japanese sword manufacturer established 140 years ago.
Fujiwara Teruyasu is a 4th generation blacksmith from Tokyo.
These knives are made with the same manufacturing methodology of a Katana (Japanese swords)

Fujiwara Teruyasu is known as the creator of san mai.
San mai is a 3 layer steel fabrication with the outside layers protecting the prized core steel.
A technique used on most good many knives today.