The Kyotoyama CR #400 is a Japanese sharpening stone specially selected for high-end hard steels such as VG10, Gingami, and Aogami (Blue Steel). Thanks to its GC (Green Carbide) abrasive, it offers excellent cutting ability while maintaining a stable and consistent sharpening feel.

With its #400 grit, this stone is ideal for restoring a dull edge, correcting a blade, or preparing for a finer finishing sharpen. It is suitable for high-end Japanese knives as well as woodworking tools such as planes, chisels, and other sharp tools.

Its vitrified ceramic type construction ensures excellent long-term stability and consistent quality even after long periods of use. Before use, it is recommended to let the stone absorb water for approximately 5 to 10 minutes to achieve the best sharpening performance.