Naniwa Whetstone #220 Super Stone S2-402

The coarsest sharpening stone in the Super Stone S2 series, ideal for fast metal removal and basic blade shaping.

- Grit: JIS 220 - Very coarse stone for foundational blade work - Japanese water stone - Dimensions: 21 x 7 x 2 cm - Abrasive: White aluminum oxide - Made in the NANIWA factory in Osaka, Japan - Made in Japan

S2 Super Stone Series

The S2 Super Stone is a series of sharpening stones specially designed for perfect finishing. These stones deliver high polishing performance and maximum edge sharpness while remaining flat and resistant to wear over time. They offer a sharpening experience similar to that of soft natural stones and are ideal even for hard carbon steel blades.

The Super Stone series requires very little soaking time—often just spraying the stone with water is enough. The abrasive material used is aluminum oxide (corundum). The “S2” designation indicates a stone thickness of 2 cm.