It is considered that there were also such facilities in Heijokyo (a previous capital), but Myohoin in Heiankyo was likely the same size as Myogyodoin (written in "Daidairizu Kosho"), which indicated the position of Myohodo was getting higher at that time.
こうした施設は平城京などにもあったと考えられているが、平安京の明法道院は本科である明経道院と同規模であったと伝えられ（『大内裏図考証』）、当時の明法道の地位の向上を伝えている。