Hou Bou - 鋒鋩
Quality Stamp on stone - 鋒從用 - “for Fengho”.
Translation – Ink Stone Grade. Nagura with this stamp are dedicated to polishing the surface of an ink stone. They are usually not stamped with a particlar strata indicated, as they are not intended to be used for sharpening. Most are cut from a lower-grade Tenjyou or Mejiro, and are typically sized a bit smaller than usual.
Fengho (鋒鋩) refers to the irregularities on the surface of an ink stone
