also: ちしょう
noun
Jishō era; Chishō era
Japanese era name (年号) spanning 1177–1181. Both readings じしょう and ちしょう are attested, with じしょう being more common.
治承年間に平家が栄えた。
The Taira clan flourished during the Jishō era.
治承の大火は1177年に起きた。
The Great Fire of Jishō occurred in 1177.
The era name 治承 was adopted in the late Heian period. The exact derivation is uncertain, but it follows the typical pattern of selecting auspicious kanji for era names.