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SHOW007 · DOCUMENTED

政綱別打

Usuba 225 mm

Usuba 225 mm · Japan

225 MM安来鋼 / YASUKI263 G

Usuba with a long blade and rounded front profile. Two separate blade inscriptions read 政綱別打, probably Masatsuna Betsu-uchi, and 安来鋼, referring to Yasuki steel. The wooden handle has a dark ferrule; its originality is undocumented.

Photographs ↓
STATUSDOCUMENTED
TYPEUsuba 225 mm
ORIGINJapan
PERIODUnidentified
ATTRIBUTION CONFIDENCEProbable
ARCHIVE NUMBERSHOW007

01 / MARKINGS / MEI

政綱別打

Observed inscription
政綱別打 / 安来鋼
Transcription
政 綱 別 打 / 安 来 鋼
Possible reading
Masatsuna Betsu-uchi — probable / Yasuki hagane
Literal interpretation
政綱: name or brand; 別打: separately forged; 安来鋼: Yasuki steel
Mark type
Engraved signature and separate steel marking
Location
Both blade faces near the heel
View the mark record →

ATTRIBUTION

Probable

The blade signature reads 政綱別打, probably Masatsuna Betsu-uchi. The characters are legible, but the company, smith and production period are undocumented. Identification is based on the blade, not the handle.

ConfirmedCONFIRMED
ProbablePROBABLE
TentativeTENTATIVE
UnidentifiedUNIDENTIFIED

SPECIFICATIONS

Blade type
Usuba
Overall length
400 mm
Blade length
225 mm
Weight
263 g
Grind
Probably single bevel — photographs
Handle
Wooden, dark ferrule; originality undocumented
Steel
Marked 安来鋼 (Yasuki); exact grade unidentified
Construction
Unidentified
Heel height
50 mm
Spine thickness
3 mm
Saya / sheath
Not documented

02 / Condition & care

DOCUMENTED CONDITION

  • Several visible chips in the cutting edge.
  • Patina, scratches and local brown corrosion marks on the blade.

WHAT WE PRESERVE

  • Surviving 政綱別打 and 安来鋼 blade markings

04 / Research & provenance

RESEARCH NOTES

  1. 01

    安来鋼 denotes Yasuki steel. It does not identify Shirogami, Aogami or a grade number.

  2. 02

    別打 is a special-production designation; it alone proves neither a custom commission nor the highest quality.

  3. 03

    A comparison auction listing supports the reading Masatsuna; it does not confirm a specific maker.

View the mark record →

PROVENANCE

The owner supplied the usuba classification, dimensions and weight. Handle originality, previous interventions and earlier history are undocumented.

CURRENT STATUS

SHOWROOM — availability on Aukro

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