annual ceremony of reciting the names of the Buddhas
A Buddhist ceremony, also known as 仏名会 (ぶつみょうえ). The term is specific to religious contexts.
See also: 仏名会
The Obutsumyō is a Buddhist ceremony held at the end of the year.
From 御 (honorific prefix) + 仏名 (names of the Buddhas). The exact historical derivation is uncertain; the term is a specialized Buddhist expression.