Japanese Natural Whetstone 145g Mikawa Shiro Nagura 純三河白名倉 Tenjio 天上 Tokkyu 特級

This is an authentic Japanese natural whetstone: a **145g Mikawa Shiro Nagura** (純三河白名倉) graded as **Tenjio** (天上) – the highest "heavenly" level – and further classified as **Tokkyū** (特級, special/superior grade).


Mikawa Shiro Nagura, mined from the renowned Mikawa region in Aichi Prefecture, is one of the most prized nagura stones among Japanese knife sharpeners. It is specifically used before and during finishing on natural Japanese waterstones to create a fine, creamy slurry that enhances cutting speed, refines the edge, and produces an exceptionally polished, hazy (kasumi) or mirror-like finish on single-bevel blades and high-end kitchen knives.


The Tenjio Tokkyū designation indicates top-tier purity, density, and performance – free of inclusions, with ultra-fine abrasive particles that deliver outstanding feedback and edge refinement. This compact 145g piece is ideal for both professional sharpeners and enthusiasts seeking the ultimate in natural sharpening results.