Nihonto Katana Hasō Hidetada (波草 秀忠) with NTHK Kanteisho Certificate

Description

ITEM DESCRIPTION:

Comes with kimono or cotton bag. Comes with certificate of supein Nihonto. Comes with copy of Tokosusho. Comes with NTHK Kanteisho Certificate.

Documentation

Documentation

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  鑑定書 (Kanteisho / Appraisal certificate)

  “Appraisal certificate.”

  “One sword (katana).”

  “Den / attribution: ‘Hasō’ (波草), Hidetada (秀忠).” (transcribed exactly as written)

  “Genuine. Length: 2 shaku 3 sun 8 bu (有之 = ‘recorded as such’).”

  “Non-profit organization: Nihon Tōken Hozon-kai (日本刀剣保存会).”

  “Chairman: Ōhashi Hiroshi (大橋博).” (with seal)

  Text (as shown):

  Mei: mumei (unsigned).

  Construction: forged; iori-mune; ubu nakago.

  Hamon: yakidashi present, togari-gunome.

  Nakago: kesho-yasurime sujikai.

  Mekugi-ana: one.

  Torokusho / Registration

  Text (as shown):

  “Firearms and swords registration certificate.”

  Type: katana.

  Length: 72.0 cm.

  Curvature: 1.8 cm.

  Mekugi-ana: 1.

  Mei (omote): mumei.

   

  Smith, attribution, and context

  The blade is registered as mumei. The kanteisho additionally records an attribution to the mastersmith: Hasō Hidetada (秀忠).

  Overall, it reads as practical sugata, ubu tang per the dossier, and a hamon featuring yakidashi and a strongly defined togari-gunome rhythm.

  Technical description of the blade (hamon → jihada → nakago → geometry/condition)

  The hamon is clearly visible as togari-gunome (repeating pointed peaks) with yakidashi at the machi, matching the technical sheet. Fine activity (nie/nioi, sunagashi, etc.).

  The nakago is mumei, with one mekugi-ana, and is documented as ubu (生ぶ中心). The sheet specifies 化粧付筋違い (kesho-yasurime sujikai), a formal, presentational filing pattern.

  Regarding geometry, based on documentation and visual reading: shinogi-zukuri katana with iori-mune, nagasa 72.0 cm and sori 1.8 cm. The kissaki shows a clear yokote in the full-length shots, consistent with a chū-kissaki proportion.

  Mounting (shirasaya)

  The sword is housed in a light-wood shirasaya (storage mounting). For a blade of this profile, shirasaya is not a mere accessory: it is the correct solution for long-term preservation, stable storage, and a sober, collector-grade presentation.

  Spec sheet
  Field Data
  Type Katana (刀)
  Mei 無銘 (mumei)
  Nagasa 72.0 cm (Torokusho) / 二尺三寸八分 ≈ 72.12 cm (Kanteisho)
  Sori 1.8 cm
  Mekugi-ana 1
  Construction 鍛造り・庵棟・生ぶ中心
  Hamon 焼き出し有り・尖り互の目
  Period (per dossier) 昭和前期
  Attribution on kanteisho 伝波草　秀忠