However, Hakase was a reference to chant, and in order to learn Shomyo, kuden (also called roi, or direct initiation by an instructor) was necessary; therefore, conservation and inheritance were impossible from the perspective of a master to a disciple.
しかし博士は、唱えるための参考であり、声明を習得しようとすれば、口伝（ロイとも言う）（指導者による面授）が必要であり、師から弟子への流派の維持・継承は出来ない。