長ちょう暦りゃくちょうりゃくMeanings1nounChōryaku era (1037.4.21-1040.11.10)A specific Japanese era name (年号) from the Heian period. Used in historical contexts.長ちょう暦りゃく元がん年ねんは西せい暦れき1037年ねんにあたる。The first year of the Chōryaku era corresponds to 1037 CE.