Overview

Meiwa (明和), usually translated as "Radiant Harmony," was the Japanese era name (nengō) that followed Hōreki and preceded An'ei. The Meiwa era began in June 1764 and ended in November 1772. Era names in Japan are part of a calendrical system used to mark and number years; they were traditionally chosen for their auspicious meanings and sometimes changed in response to events.

Chronology and imperial context

Meiwa encompassed the later portion of the reign of Empress Go-Sakuramachi and the early years of Emperor Go-Momozono. Go-Sakuramachi is notable as one of the few women to serve as Japan's sovereign. The succession that occurred during the Meiwa era is an example of how era names could span more than one reign: the era continued across the transition of emperors rather than changing immediately at accession.

Notable events and conditions

The Meiwa years were marked by a combination of political, social and natural occurrences typical of mid‑Edo Japan. Contemporary records note several significant disasters and developments that affected urban and rural life:

  • Natural disasters: Chroniclers record severe earthquakes and tsunamis in the period, including a major seismic event and accompanying tsunami in the Ryukyu/Yaeyama region in 1771.
  • Urban conflagration: In 1772 Edo (modern Tokyo) suffered a catastrophic fire—often called the Great Meiwa Fire—that destroyed large swaths of the city and led to extensive rebuilding and relief efforts.
  • Governance and society: As with other mid‑Edo eras, the period saw ongoing management of agricultural production, taxation, and responses to food shortages and price instability at the local and domain levels.

Significance and legacy

Meiwa is remembered less for large administrative reforms than for the disasters and social stresses recorded in contemporary diaries and official reports. The sequence of calamities during the later Meiwa years influenced urban planning, fire prevention measures in Edo, and the policies of local domain governments. Historians also use Meiwa as a chronological marker when discussing cultural and economic developments of the late 18th century in Japan.

Terminology and references

The practice of naming eras—known in Japanese as nengō—was inherited from earlier East Asian traditions and continued throughout the imperial period. Those researching Meiwa will encounter it in primary sources, temple and government records, and later historical works that organize events by era name rather than by continuous year counts.

Because era names are compact chronological labels, Meiwa remains a convenient reference point for scholars studying mid‑Edo political transitions, disaster history, and the social responses to crises in premodern Japan.