Kōhō (康保, Kōhō) is the Japanese era name (nengō) that covered the years from July 964 through August 968 in the mid-Heian period. Era names are a traditional system for numbering years in Japan, and Kōhō succeeded the Ōwa era and was followed by the Anna era. The term nengō is commonly used to refer to these official regnal or era titles.
Overview and dates
The Kōhō era began in July 964 and ended in August 968, a span of about four years. In Western chronological terms it lies in the mid-10th century, during the long Heian period when court aristocracy and the imperial household exercised cultural influence from the capital at Heian-kyō (modern Kyoto).
Rulers and succession
- Emperor Murakami (村上天皇) reigned until 967; his death led to a succession change during the Kōhō era.
- Emperor Reizei (冷泉天皇) succeeded Murakami and reigned into the following years; part of his early reign falls within Kōhō.
Context and characteristics
Kōhō is characteristic of Heian-era era names that often changed for auspicious reasons, in response to significant events, or upon imperial succession. During this century the court culture emphasized poetry, ceremonial rites, and the consolidation of aristocratic family influence. The nengō system acted as a framework for official documents, court records and dating historical events.
Importance and legacy
Although the Kōhō era does not stand out for a single widely remembered event in broad popular memory, it marks a routine transitionary period in Heian politics and chronology. Scholars and historians use era names like Kōhō to anchor annals and diaries of the period, making them useful for chronological research into court life, literature and administrative records.
Notable facts and distinctions
Kōhō is one of many short nengō typical of the ninth and tenth centuries. Its placement between Ōwa and Anna helps organize the sequence of reigns and events; using the nengō system remains important for interpreting primary sources from the Heian court.