Antique Japanese Katana Sword with Notare-Gunome Hamon signed Ishidō Teruhide — 10th Generation Ishidō School

Signature (Mei): 石堂輝秀作 Ishidō Teruhide saku Swordsmith: Ishidō Teruhide (菊池清一, Kikuchi Seiichi) — 10th generation Ishidō family School / Tradition: Ishidō School — descendant of Musashi Daijō Koreichi and Ishidō Unju Koreichi Period: Shōwa era (昭和) — modern traditionally-forged nihonto Mounting: Koshirae — iron maru-gata tsuba with landscape relief, brass fuchi-kashira with karakusa engraving, navy ito tsuka-maki over samegawa, gilt brass menuki, gold silk sageo Blade Length (Nagasa): 67.4 cm Curvature (Sori): 2.6 cm Mekugi-ana: 1 Shape: Shinogi-zukuri, chu-kissaki Hamon: Notare-gunome, nie-deki, bright and active nioiguchi Boshi: Ko-maru with clean turnback, fukura kareru tendency Nakago: Signed omote: 石堂輝秀作 (Ishidō Teruhide saku), 1 mekugi-ana A katana signed Ishidō Teruhide saku (石堂輝秀作) — the personal work of Kikuchi Seiichi, 10th generation of the historic Ishidō family, forged during the Shōwa era by one of Japan's most lineage-rich smithing dynasties. At 67.4 cm nagasa with a commanding 2.6 cm sori in pronounced koshi-zori, the blade carries the assertive, grounded geometry of a sword built for practical purpose — forged during a period when Teruhide's skill was directly engaged in producing blades of the highest functional standard. The hamon is a vigorous notare-gunome — broad rolling waves of notare punctuated by rhythmic gunome peaks, the whole executed in a bright nie-deki that fills the nioiguchi with dense crystalline activity. This is a hamon that announces itself immediately and rewards sustained examination: the nie catches differently at every angle, the boundary line between hardened and unhardened steel alive with the micro-structure that only traditional differential hardening produces. The high-quality polish presents the hamon with full clarity, doing justice to the smith's command of the forge and the clay. The boshi closes in ko-maru with a slight fukura kareru tendency — a tightened tip profile that reflects deliberate technical control. The chu-kissaki is well-proportioned, the shinogi lines clean and precise throughout the blade length. The overall character is one of a smith fully in possession of the Ishidō school's classical hamon vocabulary, applied with the confidence that comes from direct lineage transmission across ten generations. The nakago bears the smith's signature on the omote face: 石堂輝秀作. One mekugi-ana. The Kanagawa Prefecture toroku-sho, issued in 2024, confirms full legal status for ownership and international export. Koshirae Details The sword is presented in a complete koshirae built around a coherent dark-and-gold aesthetic — navy silk, aged iron, gilt brass, and gold sageo forming a harmonious ensemble of understated refinement. The tsuba is a round (maru-gata) iron plate with a deeply aged black patina, carrying a low-relief landscape decoration with traces of gold zōgan surviving near the nakago-ana. Both hitsu-ana are open. The worn, textured iron surface reads as genuinely antique — the tsuba was likely a period piece incorporated into this mounting, its age contrasting pleasingly with the other fittings. The fuchi is in gilt brass, engraved with flowing karakusa (arabesque scrollwork) — a clean, confident line that frames the tsuka without competing for attention. The kashira end cap mirrors this exactly in the same material and motif, completing a matched fuchi-kashira set. Both carry warm gold tone preserved in the engraved recesses, consistent with age. The tsuka is wrapped in navy silk ito (kon-ito) in tight hishimaki (diamond) pattern over white samegawa (ray skin), the cream tubercles of the ray skin showing clearly through the diamond windows. The wrapping is even and well-tensioned. The menuki are a matched pair in gilt brass, their subject rendered with naturalistic detail — small sculptural forms that catch the light beneath the ito braid and add warmth to the overall handle presentation. The sageo (saya cord) is a substantial braid in gold/kincha silk, accompanied by a decorated silver-toned kurikata bead engraved with karakusa motif — consistent with the overall fitting vocabulary of the koshirae. The saya is finished in smooth black lacquer, unadorned, allowing the metalwork to carry the visual interest of the mounting. Swordsmith Background — Ishidō Teruhide Ishidō Teruhide (石堂輝秀), whose given name was Kikuchi Seiichi (菊池清一), was born in 1900 (Meiji 33) and represents the 10th generation of one of Japan's most distinguished swordsmithing dynasties. His lineage traces directly to Musashi Daijō Koreichi, who was born in Ishidō Village in Omi Province (present-day Shiga Prefecture) during the Edo period and later relocated to Edo, and through him to Ishidō Unju Koreichi — the seventh-generation master of the late Edo period who served the Tokugawa shogunate and whose blades bore the Aoi crest on the tang, the highest mark of official recognition under the Tokugawa system. Following the Meiji Restoration's ban on swords (haitōrei of 1876), the Ishidō family — like many great smithing lineages — redirected their metalworking expertise into tool making to survive. It was in this context that the young Kikuchi Seiichi, at the age of nine in 1909 (Meiji 42), apprenticed under Ishidō Shuichi, the 9th generation of the family, and immersed himself in the forging techniques that had defined the Ishidō name for over two centuries. During the Second World War, Teruhide was engaged in military sword production, and his blades — by all accounts — demonstrated skills fully worthy of the family's prestigious heritage. His wartime output was recognized for superior cutting quality, a benchmark the Ishidō school had maintained since the Edo period. After the war, with sword production again restricted, Teruhide channeled the same mastery of steel into plane making (kanna), becoming celebrated among master carpenters across Japan. The quality of his planes was described as equivalent to that of his swords — legendary enough that some master carpenters are said to have enshrined Ishidō Teruhide's planes alongside their household altars, and individual planes attributed to him are valued at up to one million yen. A smith whose work commands that kind of reverence in two separate crafts is not a man who approached the forge casually. This katana, signed with his name, is the product of that lifetime of mastery. The Ishidō School — Ten Generations of Mastery The Ishidō school (石堂派) takes its name from Ishidō Village in Omi Province (present-day Shiga Prefecture), where the founding line of the family originated before relocating to Edo during the early Edo period. The school's most celebrated early master, Musashi Daijō Koreichi, established the family's reputation in Edo with blades that drew on the classical Bizen-den and Sōshū-den traditions — active, layered hamon combining notare, gunome, and chōji elements, executed with bright nie and well-defined nioiguchi. This aesthetic became the Ishidō hallmark across every subsequent generation. The school reached one of its highest points with Ishidō Unju Koreichi, the seventh generation, who served the Tokugawa shogunate directly and was accorded the honor of placing the Aoi crest — the Tokugawa family mon — on his tangs. This level of official patronage confirms the esteem in which Ishidō work was held at the apex of Edo-period sword culture. Unju Koreichi's blades are today among the most sought-after examples of late Edo swordsmanship, and they set the technical and aesthetic standard that successive generations — including Teruhide — were trained to uphold. What defines the Ishidō tradition across all its generations is the combination of classical blade geometry with hamon of considerable movement and nie activity. Ishidō smiths did not pursue novelty — they pursued excellence within a clearly defined aesthetic framework, refining and deepening the school's inherited vocabulary rather than departing from it. The result, over ten generations, is a lineage of blades that are immediately recognizable to trained eyes: lively, bright, technically demanding, and deeply rooted in the greatest traditions of Japanese sword-making. The blade signed by Ishidō Teruhide is a direct expression of that ten-generation inheritance.