In addition to having your knife performance tuned before it ships, you will received a coupon for complimentary re-sharpening of your knife (a $12-$50 value). That is the District Cutlery difference.
Masakage's Mizu line are hand-forged by Anryu-san using iron-clad Aogami #2.
Rockwell Hardness 63-64.
Handle is cherry with resin ferrule.
This is a food prep knife designed for users who value excellent sharpness and edge retention and who can tolerate the reactivity of the blade as they are prone to discolor food they come in contact with.
Japanese chef knives are brittle and are designed for cutting soft tissue foods. High Carbon steel chef knives can rust if not kept dry.