The Kyotoyama HSS #600 is a Japanese sharpening stone designed for modern high-hardness steels such as HSS (High Speed Steel) and Aogami Super (Blue Super Steel). Thanks to its ceramic structure and excellent cutting ability, it effectively restores the edge while providing a stable and precise sharpening feel.

With its #600 grit, this stone is perfect for restoring a dull edge, preparing for finishing, or regular maintenance of high-end knives and Japanese tools. It performs particularly well on difficult-to-work steels, while remaining pleasant to use thanks to its consistent cut.

Its generous size ensures comfortable use for kitchen knives as well as Japanese planes, chisels, and other sharp tools. Before use, it is recommended to let the stone absorb water for approximately 5 to 10 minutes to achieve the best sharpening performance.