Keian

Keian was a Japanese era name (nengō) used from 1648 to 1652 during the Edo period. Era names are traditional titles given to specific periods to mark significant events or changes. Keian followed the Meireki era and was succeeded by the Jōō era. The period saw continuity in Japan’s relative stability under strict Tokugawa rule, with no major upheavals recorded. Using a era name helps organize historical timelines in Japan. In summary, Keian is a historical time frame—roughly 1648 to 1652—used to refer to events and developments during that specific period in Japan’s history.