However, the connection between Myoho-in Temple and Hongaku-in Temple is not known with any certainty, and there are theories that Myoho-in Temple was founded after separating from Hongaku-in Temple, opposing theories that Hongaku-in Temple separated from Myoho-in Temple, and a theory that Myoho-in Temple is an alias for Hongaku-in Temple.
しかし、妙法院と本覚院の関係は必ずしも明確でなく、本覚院から分かれて妙法院が成立したとする説、逆に妙法院から本覚院が分かれたとする説、妙法院は本覚院の別号だとする説などがある。