It is also called "Enmei Jikku Kannongyo" (Kannon Sutra for Long Life in Ten Statements), and the person who added the two characters 'en mei' is Hakuin, who lived in the Edo Period and is considered to be chuko no so (father of restoration) of the Rinzaishu sect, as described below.
別名を『延命十句観音経』（えんめい―）とも言うが、「延命」の二字を付け加えたのは江戸時代の臨済宗中興の祖といわれる白隠である（後述）。