It was also called Joraku-e, and is depicted in "Sanpo-e" (a Japanese literary collection of Buddhist narratives) as the first of 'Nenchu Shuyo Hoe' (The main Buddhist services in whole year).
常楽会（じょうらくえ）とも称されており、『三宝絵』の中でも「年中主要法会」の一として記されている。