noun
Keiō era (1865-1868)
Japanese era name spanning from April 1865 to September 1868, the last years of the Edo period.
慶応元年は西暦1865年にあたる。
The first year of the Keiō era corresponds to 1865.
慶応義塾大学は慶応年間に設立された。
Keio University was founded during the Keiō era.