Honmon no Kaidan': Koto-no-kaidan is a place where Honmon Kaidan Dai-Gohonzon (principal image) is enshrined, and Gi-no-kaidan is a place where Gohonzon stays.
「本門の戒壇」：事の戒壇は本門戒壇大御本尊を安置する処、義の戒壇は御本尊所住の処。