説明

Signature (Mei): Mumei (unsigned) — attributed by the NBTHK to 丹波守照門 Tanba-no-kami Terukado Swordsmith: Tanba-no-kami Fujiwara Terukado — leading Seki smith of the early Edo period School / Tradition: Zenjō lineage, Seki — Mino-den tradition Period / Province: Edo period, Shintō — Mino Province (Seki, modern Gifu Prefecture) Certificate: NBTHK Hozon Tōken (保存刀剣) No. 3036709 — issued 28 May Reiwa 7 (2025) Japanese Registration (Tōroku-shō): Hyōgo Prefecture No. 6063 — originally issued 12 December Shōwa 26 (1951) Mounting: Complete katana koshirae — gold-speckled lacquer saya with same panel, cloisonné enamel fuchi-kashira, iron mokkō tsuba Blade Length (Nagasa): 70.9 cm (2 shaku 3 sun 4 bu) Curvature (Sori): approx. 1.2 cm (4 bu) — shallow Kanbun-shintō curvature Mekugi-ana: 2 Shape (Sugata): Shinogi-zukuri, iori-mune, chū-kissaki Hamon: Notare with gunome mixed in, nioi-deki with a soft, luminous nioiguchi Boshi: Notare-komi with a rounded turnback An NBTHK Hozon-certified katana attributed to Tanba-no-kami Terukado , one of the outstanding Seki smiths of the early Edo period. The blade measures a full 70.9 cm in nagasa with a shallow sori of roughly 1.2 cm . When the NBTHK names an individual smith on an unsigned blade rather than stopping at a school, it means the workmanship carried enough of that smith's specific character for the panel to identify the hand. In this case the name is unusually precise: Terukado was used by one man across a single generation. The sugata dates the blade on sight. A 70.9 cm nagasa with barely 1.2 cm of curvature and a compact chū-kissaki is the Kanbun-shintō shape almost exactly — the near-straight, businesslike profile that dominated Japanese swordmaking in the 1660s and 1670s, when the drawing arts had displaced cavalry work and a blade was judged on how fast it came out of the saya and how cleanly it tracked. Terukado received his Tanba-no-kami title in 1659, placing him precisely in that generation. The hamon is a flowing notar