* Image is for illustrative purposes only.Yamashiro Smithing Decline in the Ōnin War Aftermath
応仁後の山城鍛冶衰退期
When the Ōnin War (1467–1477) reduced Kyoto to scorched earth, the great schools of Yamashiro tradition—including the Raishō and Awata-guchi schools—suffered devastating blows. Smiths who escaped scattered throughout the provinces, and as Yamashiro sword culture rapidly declined, it paradoxically became an indirect catalyst for the flourishing of regional sword cultures in Bizen and Mino.
Description
The Ōnin War and the Destruction of Kyoto
The Ōnin War, which erupted in 1467, transformed Kyoto into a battlefield for more than a decade. The war fires indiscriminately burned out the sword-smith residential districts of Awata-guchi, Sanjō, and Gojō. The Yamashiro tradition—which had once dominated Japanese sword production—suffered catastrophic losses: the workshops of great schools such as the Raishō, Awata-guchi, and Sanjō families were burned or scattered. Though the smiths themselves barely escaped with their lives, they lost nearly everything: workshop equipment, forging tools, order ledgers, and the master-disciple networks that had been passed down for generations. After the Ōnin War, production of "Yamashiro blades" (yamashiro-mono) declined rapidly, and by the mid-to-late Muromachi period, Yamashiro had completely lost its leading role to Bizen and Mino producers.
The Dispersed Yamashiro Smiths
After the Ōnin War, smiths who fled Kyoto relocated throughout the provinces, seeking to apply their skills in new lands. Smiths inheriting Raishō traditions scattered to nearby provinces such as Settsu, Kawachi, and Kii, where they transmitted Yamashiro techniques to local smiths. Some sought patronage from powerful daimyo and relocated to influential centers in the east and west, operating under names such as Kunitsugu and Kunihiro of the Raishō line. However, technical transmission at the source—in Yamashiro itself—became sporadic, and the essence of the Yamashiro tradition—the refined ko-itame grain and deeply-nieled straight blades that characterized Awata-guchi and Raishō work—gradually disappeared. Yamashiro blades made after Ōnin are classified as "Late Old Swords" (sue-kotō), but compared to works from the Kamakura and Nanboku-chō periods, the overall decline in quality is undeniable.
The Rise of Bizen and Mino
In stark contrast to Yamashiro's decline, this era saw Bizen Province (Okayama) and Mino Province (Gifu) rise to prominence as Japan's greatest sword-production centers. The Osafune faction of Bizen was not directly damaged by the Ōnin War and continued vigorous operations through smith groups such as Osafune, Fukuoka, and Hatada. The Bizen blades of this period, known as "Late Bizen" (sue-Bizen), showed declining individual craftsmanship as a result of prioritizing mass production, yet they maintained a remarkable industrial agglomeration with hundreds of active smiths. The Mino tradition, inheriting from the Shizu and Kanetsugu schools, underwent remarkable development through the Seki smiths beginning in the mid-Muromachi period, and Mino forging—with its excellence in practical functionality—became the preferred choice of samurai throughout the nation.
The Age of Gekokujō and Swords
The defining social characteristic of this period was "gekokujō"—the tendency for those of lower rank to overthrow their superiors. Provincial daimyo were defeated by their subordinates and local warlords, and new regional powers rose in rapid succession. These rising samurai, unconcerned with lineage and prestige, sought practical and powerful blades and increasingly preferred the strong, functional swords of Bizen and Mino over the refined aesthetics of Yamashiro tradition. While the authority of Yamashiro blades was still acknowledged, the actual demand was increasingly met by regional producers—a structure that became entrenched. Cut off from their former stable patrons in the nobility and shogunate, sword smiths were forced to operate in an unstable economic environment, responding to the short-term demands of competing regional lords.
Technical Discontinuity and Transmission
The most serious problem in post-Ōnin Yamashiro swords was the loss of the secret forging techniques that made Raishō and Awata-guchi schools renowned. The methods for creating densely-packed ko-itame grain with tight ji-tetsu, the heat-treatment technology for deeply-nieled straight blades, and the subtle details of tang finishing—all techniques transmitted orally from master to disciple for generations—were largely lost through workshop destruction and the severance of master-disciple relationships. Although attempts were made to revive Yamashiro tradition during the Edo period's New Sword era, complete restoration was ultimately never achieved. This technical discontinuity is regarded as one of the greatest losses in Japanese sword history and stands as testimony to the profound cultural destruction wrought by the Ōnin War.
Characteristics of This Era
- The Yamashiro blades produced after Ōnin, known as 'Late Yamashiro' (sue-Yamashiro), show an overall decline in both ji-tetsu and blade pattern compared to celebrated works from the Kamakura period. The impact of technical discontinuity is directly evident in the work.
- Smiths claiming direct succession from the Raishō and Awata-guchi schools appeared throughout the provinces, but were unable to reproduce the technical standards of Yamashiro itself. This era saw a widening gap between would-be successors trading on traditional prestige and those who possessed genuine technical transmission.
- The rise of Mino and Late Bizen schools was dramatic. Market-dominating practical Kanetsugu-line Mino blades and mass-produced Bizen swords swept the market, leaving Yamashiro blades to survive merely as expensive, rare-item prestige pieces.
- The gekokujō-era society transformed sword demand. As more warlords prioritized battle performance over lineage and tradition, the criteria for evaluating smiths shifted from 'works of great schools' to 'practical cutting efficiency.'
- Though some smithing activity resumed during Kyoto's reconstruction, combined with the Muromachi shogunate's declining authority, stable patronage systems were lost, leaving smiths' lives in extreme uncertainty.