Ume Series

Nubatama Ume Series waterstones deliver maximum tactile feedback and smooth bevel control across traditional cutlery and woodworking tools. Formulated with a softer, higher-porosity matrix than the fast-cutting Bamboo series and available in specialized binder hardnesses (Standard, Hard, Extra Hard)—unlike the ultra-hard Platinum line—Ume stones produce a rich, cushioned slurry with a brief soak. Every stone in this collection originates directly from the authentic Ken Schwartz Estate.