Hōen Period
保延期
A brief period from 1135 to 1141 in the Late Heian era, corresponding to the peak of Ko-Bizen tradition when swordsmith creativity flourished.
Description
The Hōen period (1135–1141) was a brief time in the Late Heian era, marking the zenith of the Ko-Bizen school. This was an age when swordsmith creativity flourished and works from Bizen Province (modern Okayama Prefecture) were highly prized.
Golden Age of Ko-Bizen
The Hōen period witnessed the flowering of Ko-Bizen swordsmith innovation. Master smiths such as Bizen Tomonari, Bizen Masatsune, and Bizen Kanehira were active during this time. Ko-Bizen blades were characterized by their elegant and narrow form, small kissaki (point), narrow temper lines with small ko-choji irregular patterns (inazuma), and beautiful wood-grain jihada (steel grain).
Stylistic Development
The Hōen period represented a crucial transitional phase in sword aesthetics between the Heian and Kamakura periods. Blades produced during this era demonstrated the evolution from Heian kotō toward Kamakura kotō styles, exerting significant influence on the later development of the Five Traditions. The Bizen tradition in particular was crystallizing through the innovations of the period's craftsmen.
Historical Context
The Hōen period coincided with the height of the Insei (rule by retired emperors) system, when the influence of the retired Emperor Shirakawa (白河法皇) remained powerful. The rising warrior class increased demand for fine swords, spurring technological advancement among swordmakers.
Characteristics of This Era
- Graceful narrow Ko-Bizen form
- Small kissaki (point)
- Narrow ko-choji temper line
- Distinctive inazuma (lightning-bolt) and kin-suji (golden stripes) in the blade
- Elegant wood-grain jihada