* Image is for illustrative purposes only.Ōan Era Swords (1368–1375)
応安期の刀剣
The Northern Court era name Ōan (1368–1375), during which the child shogun Ashikaga Yoshimitsu took office under the regency of kanrei Hosokawa Yoriyuki, whose Ōan Hanzei Order expanded shugo daimyō authority over estate lands. A transitional period in which the bold ōdachi style established during Enbun–Jōji persisted.
Description
Historical Background of the Ōan Era
Ōan was a Northern Court era name spanning 1368 to 1375. When the second Ashikaga shogun, Yoshiakira, died the previous year, his ten-year-old son Yoshimitsu became the third shogun, with deputy shogun (kanrei) Hosokawa Yoriyuki effectively running the bakufu. In the sixth month of Ōan's first year (July 1368), the government issued the "Ōan Hanzei Order" (Jisha Honjoryō no Koto), which permanently allowed provincial military governors (shugo) to claim not only half the annual tax yield of estates but half the land itself — dramatically expanding shugo authority. On the Southern Court side, Emperor Chōkei reigned, and the Nanbokuchō civil war continued.
Sword Style Characteristics
The bold, wide-bladed ōdachi (great tachi) style established during the Enbun–Jōji eras (1356–1368) persisted through Ōan, driven by continuing demand for long blades suited to both mounted and infantry combat during the civil war. Many of these outsized Nanbokuchō blades were later shortened (suriage) by families such as the Hon'ami during the Edo period to more practical lengths, and such shortened examples survive today.
Representative Smiths
The Osafune-school smith Kanemitsu has dated works spanning from the Genkō era (1321–1324) through the Ōan era, marking him as a smith active over an unusually long stretch of the Nanbokuchō period. The son of Kagemitsu, he left behind numerous bold ōdachi and extended tantō.
Social Context
The strengthened economic base that shugo gained through the Ōan Hanzei Order likely helped sustain demand tied to the retainer bands and smiths of daimyō across the provinces. Amid the still-ongoing Nanbokuchō civil war, Ōan was a transitional era in which reorganization of shogunal authority and the expansion of shugo rule proceeded together.
Characteristics of This Era
- Ōan Hanzei Order (1368) — permitted shugo to claim half of estate land itself, not just tax yield, institutionally expanding shugo daimyō authority
- Continuation of the Enbun–Jōji style — the bold, wide ōdachi and nodachi style persisted through Ōan
- Ongoing Nanbokuchō civil war — the Northern Court (Go-Kōgon/Go-En'yū) and Southern Court (Chōkei) continued in parallel
- Later suriage shortening — many Ōan-era ōdachi were later shortened by Hon'ami and others during the Edo period