The event came to be called Shuni-e during the Heian period, though it had been called Jyuichimen Keka Ho during the Nara period, and even now it is the official name.
修二会と呼ばれるようになったのは平安時代で、奈良時代には十一面悔過法（じゅういちめんけかほう）と呼ばれ、これが今も正式名称となっている。