Gassaku Kogatana

Gassaku denotes that a blade was made cooperatively by two people. 

This particular kogatana was a collaboration between a top level (mukansa) Japanese sword smith and myself. 

The forging processes were performed  by the Japanese sword smith.  Tsuchioki (clay application), yakiire (heat treatment) and kajitogi and other finish work was performed by myself.

The hada is fine itame and the hamon is choji.