Discover the finest quality Japanese natural stones at our store, where each stone is meticulously examined and presented with detailed photographs.

Experience the impeccable craftsmanship of perfectly shaped, line-free Kyoto natural whetstones without the exorbitant price tag of 200K to 500K yen per piece. Our collection of Koppa stones, non-rectangular smaller stones sourced from the same layers as their pricier counterparts, offer exceptional quality at a more accessible cost.

At our store, we are dedicated to providing our customers with top-notch Koppas while spreading the allure of Kyoto's natural stones across the globe.

While Koppa stones may present some challenges in achieving a straight sharpening angle, a touch of resourcefulness will allow you to enjoy their sharpening prowess at a significantly lower price than premium stones.

These unique natural whetstones are formed from the laminated remains of microscopic organisms that once thrived in the oceans during the Cretaceous period. Each stone possesses a one-of-a-kind composition and appearance.

Don't miss the opportunity to own a truly distinctive stone—once you find the perfect one, secure it right away, as no two stones are alike!