Bunmei-Meiō Bizen Revival

Political Vacuum After the Ōnin War and Surge in Sword Demand

The Ōnin War, fought from Ōnin 1 (1467) through Bunmei 9 (1477), dealt a decisive blow to the authority of the Ashikaga shogunate and opened an era of gekokujō (the overthrow of superiors by inferiors). As the Sengoku period began in earnest, with regional daimyo and minor lords competing for power across the land, demand for swords surged dramatically. A new age had arrived in which provinces needed to supply vast quantities of practical swords for large numbers of soldiers, including ashigaru foot soldiers, rather than individual warriors.

The smiths centered on Osafune (in present-day Okayama Prefecture) in Bizen Province most effectively answered this new demand. Traditionally, Bizen smiths had followed an artisanal approach, with individual master craftsmen carefully infusing each blade with their personal skill and aesthetic sensibility. However, the Bizen smiths of the Bunmei-Meiō period underwent a major transformation. Dozens of smiths collaborated and divided their labor across specialized stages—procurement of materials, forging, hardening, and finishing—establishing an organized production system that maintained a certain level of quality while enabling mass production.

Three Houses of Sue-Bizen

The three master smith families that represented Bizen during the Bunmei-Meiō period were Osafune Katsumitsu, Osafune Munemitsu, and Osafune Sukesada. The Bizen blades produced by these three families and their contemporaries in the late Muromachi period are collectively termed Sue-Bizen (Late Bizen) and distinguished from the Kō-Bizen (classical Bizen) of the late Heian through early Kamakura period.

Osafune Katsumitsu rose to prominence during the Bunmei era, and records exist of blades bearing paired signatures with Munemitsu and dated inscriptions. Katsumitsu's work is characterized by an elegant hamon (edge pattern) that interweaves choji (clove-blossom patterns) within a midare (random wave pattern). His finest custom commissioned pieces inherited the orthodox tradition of classical Bizen from the mid-Kamakura period with distinguished refinement. Munemitsu, also an acclaimed smith active in approximately the same period, is known for excellent independent works in addition to his collaborations with Katsumitsu.

Osafune Sukesada founded the largest smith family of Sue-Bizen. It is believed that dozens of smiths bearing the Sukesada signature were simultaneously active in the same era, because "Sukesada" was transmitted as a family or workshop name across generations. Sukesada's blades range widely in quality, from mass-produced tabagata (bundle-swords) to carefully executed custom commissions for particular warlords. However, the finest custom-commissioned pieces demonstrate hada (metal surface) fineness and hamon clarity that approaches the refinement of classical Bizen. The works of smiths bearing titles such as Yosozaemon no Jō Sukesada and Hikobē no Jō Sukesada received particularly high praise even within Sue-Bizen.

Rise of the Uchigatana

The Bunmei-Meiō period was an era of significant morphological change in sword design. The tachi (swords worn hung from the waist), which had dominated the Kamakura and Nanboku-chō periods, gave way to the uchigatana (swords thrust through the belt) as the primary weapon of actual warfare. The uchigatana was shorter than the tachi (blade length approximately 2 shaku 3 sun to 2 shaku 5 sun), worn thrust through the belt with the edge facing upward in the taitō (belt-worn) style, and its form was well-suited for ashigaru foot soldiers engaged in group combat. The Sue-Bizen smiths responded nimbly to this new demand and played a leading role in mass-producing uchigatana.

Tadamitsu and the Bridge to the Eishō Era and Beyond

The Sue-Bizen of the Bunmei-Meiō period produced many smiths including Tadamitsu, Kiyomitsu, and Sukemitsu, establishing a rich human foundation that extended into the subsequent Eishō and Tenbun eras (1504–1555). Tadamitsu, alongside Katsumitsu, Munemitsu, and Sukesada, was an important Sue-Bizen smith whose signed, dated works are valuable sources in the chronological study of Sue-Bizen.

The Bizen blades of the Bunmei-Meiō period possess a unique charm, standing at the intersection of classical Bizen tradition and Sengoku-era practicality. In authentication, one's discernment is tested in identifying the "finest Sue-Bizen works"—pieces that have begun to lose the refinement of classical Bizen yet still show honesty in their craftsmanship. The dual-track production system of mass manufacturing and custom commissioning that these smiths established during this era holds important historical significance as a precursor to sword production in the subsequent Edo period.