Grit Table / naturals / Kyoto honyama finishers (named mines)
Product, no maker data
Natural stone
No particle size in microns is published for this line. The values are our estimates from secondary sources, so the marks are faded and the spread is unknown.
Each grade below shows its size in microns, its spread (the published distribution, where a maker or standard gives one; most makers publish none), and where that size lands on the reference scale, a shared yardstick for reading grit numbers across makers.
C-estimated from dealer ~#8000 to #10000 (Tomae/Suita); western Tanba honyama, mine closed decades ago, pre-closure stock.
C-estimated from dealer feel ~#6000 to #15000 (king of suita); the cited #20000 is off the JIS scale and unconvertible.
C-estimated ~#8000 to #10000; softer stone, favored for plane irons and chisels and kasumi.
C-estimated ~#6000 to #8000, borrowed from sibling Umegahata awasedo (no Shobudani-specific figure).