Yōwa — Japanese era name (July 1181–May 1182)

Background and naming

The practice of declaring era names, known as nengō, provided a way for the imperial court to record time and to mark significant events. Era names were changed for a variety of reasons, including auspicious omens, natural disasters, or political shifts. Yōwa was one such brief era introduced amid mounting national instability.

Events and context

The Yōwa period coincided with the wider conflict between the Taira and Minamoto clans, known as the Genpei War. Civil strife, military campaigning and disruption of agricultural production helped create severe hardship. Historians often highlight a widespread famine beginning in 1181 and continuing into 1182—commonly referred to in Japanese sources as the Yōwa famine—which had serious demographic and economic consequences.

Politically, the throne was held by the child-emperor Antoku, whose position reflected the influence of the Taira (Heike) family at court. The short length of the Yōwa era reflects the turbulent circumstances of the time and the frequent use of era changes as signals of renewed hope or attempts at political legitimization.

Legacy and quick facts

• Dates: July 1181–May 1182 (approximately ten months)
• Preceded by: Jishō
• Succeeded by: Juei (same link placeholder used for related chronology)
• Reigning sovereign: Emperor Antoku
• Notable issues: famine (often called the Yōwa famine) and continued Genpei War unrest

As a chronological label, Yōwa helps scholars and readers place a concentrated set of social, military, and environmental crises within the late-Heian timeline. References to this era appear in chronicles, temple records and later historical studies as a compact marker of a troubled year in Japan's medieval past.