Asano Mikawa Nagura - Tenjo, Tokujo #97U654R47

Classification

Origin / Type: Japanese Natural Slurry Stone (Jun Mikawa Shiro Nagura / 純三河白名倉).
Layer (Stratum): Tenjō (天上), typically used in mid-to-fine polishing and razor sharpening progressions.
Grade: Tokujō (特級 / Upper-Special Grade), indicating high purity and uniform grain texture.
Inspection Stamp: Authenticated with the Asano red seal (Ken-Asano / 檢淺野).

Description

Dimensions & Weight: Approx.: 70mm x 35mm x 40mm, with a wedge profile tapers to a flat working face; total weight is 150 g.
Appearance: Creamy off-white body displaying characteristic golden-tan namazu / natural skin patterning on the upper stamped surface.
Function: Used on top of a hard base whetstone (Awasedo) to create an abrasive slurry for straight razors, fine woodworking tools, and kitchen cutlery.

Evaluation

Condition: Excellent, near-mint. The inspection stamps and calligraphy are fully intact and legible. Sealed in transparent lacquer
Form Factor: Compact wedge cut with a flat base, perfectly sized as an ergonomic rubbing/slurry nagura.
Performance Quality: Free from visible toxic inclusions or hard quartz lines on the honing contact face.