A ko (講) is an event or meeting of a Literary society. Also known as Lecture company (講社, Kosha) The original meaning of the word ko was ko for lecture or kōyō, referring to a group of monks who read and studied Buddhist scriptures in a temple, and eventually came to refer to a (kokai) centering on the reading of Buddhist scriptures.。The term has been changed to folk religion to refer to a group of people who hold religious events, or their events and meetings. It can also be used to refer to a mutual aid group or meeting. Thus, the term "ko" covers a wide range of subjects.