The History of Tosogu and Their Main Schools
The term tosogu (装具) encompasses all the metal fittings of the sword: tsuba (guard), fuchi-kashira (collar and pommel of the handle), menuki (ornaments under the grip), kozuka and kogai (utility handles housed in the scabbard), kojiri…
From Functional Origins to Decorative Art
During the Heian and Kamakura periods, the fittings of tachi (swords worn suspended) remained primarily functional, made of simple iron or precious metals for the ceremonial mounts of the nobility. It was from the Muromachi period onward, with the widespread adoption of the katana worn at the waist, that the tsuba began to become a true medium of artistic expression, while the relative peace of the Edo period definitively transformed the tosogu into an object of prestige and collectible.
The Distinction Between Iebori and Machibori
The history of tosogu schools revolves around a fundamental distinction: official schools (iebori, literally « house engraving »), serving the Shogunate or the great Daimyo directly, and town engravers (machibori), working for a wider clientele of samurai and merchants, often with greater stylistic freedom.
The Goto School: Official Orthodoxy
Founded by Goto Yujo in the 15th century under the patronage of the Ashikaga shoguns, the Goto school became the official standard for the Tokugawa shogunate throughout the Edo period, spanning seventeen generations. It is distinguished by the use of shakudo (a copper-gold alloy) with an extremely regular, grainy nanako background, classical motifs inspired by Chinese art (Foo lions, dragons, phoenixes), and the katakiribori technique (asymmetrical bevel engraving imitating brushstrokes). Its almost industrial precision makes it a guarantee of quality, but also a style sometimes considered conventional compared to more expressive schools.
The Yokoya School and the Katakiribori Revolution
At the turn of the 18th century, Yokoya Somin broke with the rigid Goto style by developing katakiribori towards naturalistic and pictorial compositions, inspired by Kano and Tosa painting—landscapes, scenes of daily life, Buddhist figures. This machibori school paved the way for an explosion of creativity.
The Nara School and its « Three Masters »
Indirectly descended from the Yokoya lineage, the Nara school (Nara Toryu) is led by three major figures of the 18th century—Nara Toshinaga, Sugiura Joi, and especially Yasuchika and Tsuneshige—renowned for their high-relief sculptural work of great dramatic power, often inspired by folklore and mythology.
Regional Schools
Several provincial schools developed very distinct identities:
The Owari school, birthplace of the famous iron tsuba signed by Nobuie, favors wrought iron with a rustic and powerful texture, prized for its martial authenticity.
The Mito school, linked to the Mito branch of the Tokugawa clan, produced spectacular high-relief pieces, often in gilded shakudo, depicting naturalistic themes (birds, flowers, insects) with striking realism—Hagiya Katsuhira is a renowned later figure of this school.
The Higo school, closely linked to the aesthetics of the tea ceremony under the influence of Lord Hosokawa, favored extreme simplicity and refined ironwork; the Hayashi, Nishigaki, Shimizu, and Hirata sub-schools (the latter specializing in cloisonné enamel, shippo) are associated with it.
The Shoami school, extremely widespread throughout Japan with numerous local branches, constitutes a stylistic catch-all that is difficult to define but represents a considerable portion of Edo-period tsuba production. The Umetada school, founded by Umetada Myoju in Kyoto and later Hizen, is particularly known for the nunome-zogan technique (gold or silver inlay on hammered iron in a crosshatch pattern).
The Soten school, originating in Hizen province and founded by Nishigaki Kanshiro Soten, is distinguished by a highly recognizable style: dark iron tsuba richly decorated with high-relief brass (shinchu) inlays, generally depicting lively landscapes or battle scenes.
The Contribution of Modern Authentication
Today, it is primarily the NBTHK (Nihon Bijutsu Token Hozon Kyokai) that authenticates tosogu through its kanteisho, relying on the analysis of style, materials, signatures (mei) and their consistency with the known corpus of each school — a task made all the more complex by the fact that many pieces remained unsigned (mumei) and attributed by stylistic deduction.