Tsushima Natural Sharpening Stone #2000-#4000

Natural whetstones have been integral to Japanese traditional crafts for centuries, cherished by toolmakers, woodworkers, and swordsmiths alike. These unique stones not only embody deep cultural significance but also contribute to Japan’s global reputation for exceptional craftsmanship. While natural stones are highly sought after for their distinctive qualities, they differ significantly from ceramic whetstones in how they are used. Natural stones epitomize the Japanese idiom 一期一会 ("one moment, one meeting")—no two stones are alike. Their grit varies throughout, creating a distinctive, toothy edge that enhances a blade's cutting performance over time. Quarried from sedimentary rock formations with varying mineral compositions, these stones require users to develop a keen sensitivity to subtle changes in abrasiveness to achieve optimal results. Korin’s Tsushima Natural Stones are meticulously selected, hand-quarried, cut, polished, and reinforced to preserve their quality. However, natural stones are delicate and prone to chipping or cracking if mishandled or exposed to sudden temperature changes or prolonged water exposure. To enhance durability, Korin reinforces these stones with a protective coating on all sides, except the front sharpening surface.