The requirements are to confine oneself in the mausoleum of Oku no in in Koyasan to pray, to pass the examination of the esoteric ritual conducted by the religious service department, to stay in the rank of priest for a certain period and so on.
高野山奥の院御廟に参籠する・法会部による修法の試験に合格する・定まった年数以上僧階に留まるなど