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Mikawa Nagura Set・Tenjō / Mejiro / Koma・Traditional Japanese Nagura for Razor Honing #28
Mikawa Nagura Set・Tenjō / Mejiro / Koma・Traditional Japanese Nagura for Razor Honing #28
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Authentic Mikawa nagura set consisting of Tenjō, Mejiro, and Koma, used in the traditional Japanese razor honing progression. Intended to produce controlled, progressively finer slurry for edge refinement and preparation of natural finishing stones prior to final polishing.
Full Description
Full Description
This Mikawa Nagura set includes Tenjō, Mejiro, and Koma, forming the classical nagura progression used in traditional Japanese razor honing. Together, these stones allow precise control over slurry refinement, edge development, and surface preparation of Japanese natural finishing stones.
Sourced from the historic Mikawa region, long regarded as the standard origin for high-quality nagura, each stone plays a distinct role in the honing sequence:
• Tenjō is typically used first in the progression (you may add a Botan before at some point which is coarser). It produces a fine yet active slurry that refines the edge, reduces earlier scratch patterns, and stabilizes edge geometry while maintaining control.
• Mejiro follows, creating a finer and smoother slurry. It further refines the edge, increases sharpness, and improves surface uniformity without introducing harshness.
• Koma represents the final nagura stage before water-only or tomo finishing. It produces a very fine, dense slurry suited for maximum refinement, clarity, and smoothness—especially important for straight razors and kamisori.
When used on awasedo and other Japanese natural finishing stones, this nagura set helps to:
• Gradually refine the edge in a controlled, traditional sequence
• Improve cutting efficiency on hard finishing stones
• Create a stable, responsive honing surface for final polishing
Recommended Use
• Raise slurry progressively, starting with Tenjō, then Mejiro, then Koma
• Use light pressure and gradually dilute during each stage
• Finish on water only or with a fine tomo nagura, depending on preference
As with all natural stones, each nagura shows natural variation in hardness and feel. There is no synthetic grit rating—performance depends on technique, slurry management, and the finishing stone used.
A complete and well-balanced traditional nagura set, essential for classical Japanese razor honing.
Materials
Materials
Natural Mikawa Nagura Whetstone - Tenjo
Measurements
Measurements
Tenjo: 6x3,2x3,2 cm・96 g
Mejiro: 3x3x4,4 cm・63 g
Koma: 6x4x2,5 cm・75g
Hardness: ●○○○○ (1) soft
Care Guide
Care Guide
Japanese nagura stones are precision tools used to condition sharpening stones and refine edges. Proper care ensures consistent slurry performance and long service life.
1. Keep the Working Face True
Only the working face of the nagura—the surface used to raise slurry—needs to be kept flat. Over time, this surface may become uneven or glazed, which can affect slurry consistency. If needed, lightly lap the working face on a fine diamond plate or flattening stone, removing as little material as possible.
2. Use with Water Only
Nagura stones are designed for use with clean water. Lightly wet both the nagura and the base stone before use. Do not use oil, soaps, or chemical additives.
3. Controlled Slurry Generation
Use light, even pressure when raising slurry. Slurry density can be adjusted through pressure and dilution. Avoid excessive force, which can reduce control and consistency.
4. Clean After Use
Rinse the nagura thoroughly after each use to remove metal particles and residue. A soft brush may be used if needed. Do not use detergents or abrasive cleaners.
5. Dry Slowly and Naturally
Allow the nagura to air dry completely in a shaded, well-ventilated area. Avoid direct sunlight, heat sources, or rapid temperature changes.
6. Store Separately
Store nagura stones in a dry, stable environment and away from heavier stones to prevent impact damage. Ensure the stone is fully dry before long-term storage.
7. Inspect Before Use
Before each use, rinse the nagura and ensure it is free from grit or debris. Any contamination may scratch the base stone or blade.
By following these guidelines, your nagura stone will provide predictable slurry behavior and remain a reliable part of traditional Japanese sharpening.
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