This is an absolute pinnacle of Japanese natural stones: a Junshun Shouhonyama "Maruka" (30-Type) premium finishing whetstone, sourced from the legendary Nakayama mine in Kyoto. Purchased directly from the renowned distributor Mr. Hatanaka about 30 years ago, this museum-grade stone is a "Sokomono" (deep bottom layer) featuring a natural "Ki-tsuki" (raw bark/skin) back. It possesses an incredible density and tightness that simply cannot be found in modern stones, delivering an ultra-fine, mirror-like ultimate edge. It has an exceptional affinity with traditional hand-forged wrought iron, making it highly coveted for vintage Tokyo/Yoita planes and high-end culinary tools. While the face stamp has faded through minimal testing, the iconic official Maruka stamp (Ο with &カ;) on the side remains perfectly crisp and distinct.
Used - Like New / Collector's Investment Piece
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