Katana
Shop · 選
Clay-Tempered Katana
Clay-tempered blades are hardened differentially: thick clay is applied along the spine and a thin layer along the edge before quenching. The edge cools fast and becomes hard; the spine cools slowly and stays resilient.
The result is two different structures in one blade: a harder edge and a softer spine. The wandering line visible along the blade, the hamon, is the physical boundary between those two structures. It is a product of the process, not a polished or etched effect.
Each piece is supplied unsharpened for display and collection. Dimensions, tang construction, fittings and saya finish are stated on the individual listing.
Browse & filter
Katana
Unsharpened T10 Collector Katana — Red Saya, Tan Ito, Copper Fittings
Wakizashi
Unsharpened T10 Collector Wakizashi — Red-Brown Wood Saya, Copper Fittings
Katana
Unsharpened Pink Collector Katana — Pink Saya and Ito, Gold Openwork Tsuba
Katana
Unsharpened Dragon Maw Collector Katana — Clay-Tempered T10, Hammered Finish, Horn Saya
Wakizashi
Unsharpened Basin Dragon Collector Wakizashi — Clay-Tempered T10, Hammered Finish
Katana
Unsharpened Golden Serpent Collector Katana — Clay-Tempered T10, Bo-Hi
Wakizashi
Unsharpened Fire-Kanji Collector Wakizashi — Clay-Tempered T10, Copper Fittings
Save $10Wakizashi
Unsharpened U-no-Kubi Wakizashi — Clay-Tempered T10, Copper Habaki
Katana
Unsharpened Gilded Ronin Katana — Clay-Tempered T10, Hand-Painted Saya
Tachi
Unsharpened Deep-Curve Tachi — Clay-Tempered T10, Powder-Blue Ito, Kamon Saya
Tanto
Unsharpened Wenge Tanto — Shinogi Profile, Brass Habaki
Tanto
Unsharpened Ebony Tanto — U-no-kubi Profile, Pierced Brass Fuchi
Save $10Katana
Unsharpened T10 Clay-Tempered Collector Katana — Grey Ito, Russet Carved Saya
T10 and hamon
A hamon created by differential hardening—not a polished imitation.
In this collection, the workshop describes the T10 blade as clay-tempered: clay thickness controls the cooling rate during quenching, creating a harder edge and softer spine. The visible hamon is the boundary associated with that heat-treatment process. Hardness values are workshop-declared and are not presented as independent laboratory results.
This differs from the blackened collection, where the record declares a dark surface finish and does not confirm how any visible line was produced. Only the clay-tempered listing claims a hamon produced by differential hardening.
What stays standard
Clay-tempered pieces are supplied unsharpened for adult collection and display only. Overall length, blade length and construction are declared on each individual listing.
Read next
The Katana Steel Guide compares T10 with high-carbon, blackened, folded, kobuse, and refined-jigane workshop terminology. The FAQ explains how hardness, hamon, edge state, and dimensions are documented.
Collection FAQ
Questions about this collection.
What is a clay-tempered katana?
It is a blade the workshop states was differentially hardened using clay to control cooling during quenching, producing a harder edge, softer spine, and visible hamon.
Is the hardness independently tested?
No. Hardness values on Prime Katana are workshop-declared unless an individual listing explicitly states otherwise.
Is the blackened collection also clay-tempered?
No differential hardening or clay tempering is claimed for the blackened collection. Its record declares a dark surface finish; the steel grade and any finishing method are not confirmed.