When samurai entered the priesthood during this age, there was often political meaning behind it, and researcher Junji IENAGA states that Soun joined the priesthood because of the unnatural death of Seiko's mother, Enmanin.
この時代の武士の出家には政治的な意味があることが多く、家永遵嗣は清晃の母の円満院の横死が理由ではないかと述べている。