Morihei Hishiboshi 9000 Grit 'Karasu' Whetstone

The Morihei Hishiboshi 9000 Grit 'Karasu' Whetstone is an ultra-fine finishing stone designed for achieving maximum edge refinement, polish, and razor-level sharpness on high-performance kitchen knives.

Produced in Japan, the Hishiboshi range is known for its unusually natural sharpening feel, excellent feedback, and long service life. These stones are designed to behave more like traditional natural whetstones than typical synthetics, offering a smooth, controlled sharpening experience without the need for soaking.

The Karasu series represents the premium tier within the Hishiboshi line. These stones are made using natural whetstone-derived materials, refined into a highly consistent finishing medium. The result is one of the most refined polishing stones in the range, built for the final stage of edge work where precision matters most.

At 9000 grit, this stone is intended purely for finishing. It produces a highly polished bevel and an extremely refined cutting edge, ideal for fine slicing, delicate prep, and high-end Japanese kitchen knives where maximum sharpness and smoothness are the goal.

Despite its ultra-fine grit, it maintains excellent tactile feedback, allowing the user to feel the edge interacting with the stone and maintain full control during finishing.

Measuring 210 x 75 x 26mm, it offers a large, stable surface with enough thickness for durability and long-term professional use.

A top-tier finishing stone for sharpeners who want refined performance, excellent feedback, and a truly polished cutting edge.