A kojakin should be moistened and folded beforehand, and a guest wipes the lip of a tea bowl with the kojakin after drinking koicha (thick tea) and then he or she passes the tea bowl to the next guest.
事前に湿らせて折りたたんでおき、濃茶を飲んだ後に茶碗の飲み口を拭って次客へと茶碗を廻す。