In view of the existence of Rikujin Kanmon, which proves the fact that Seimei divined fortune with Rikujinshinka, and the fact that "Senji ryakketsu" is the commentary of Rikujinshinka, there is no need to doubt the existence of the oral tradition in the Tsuchimikado family.
晴明が六壬神課で占っていたという証拠が六壬勘文という形で存在し、『占事略决』が六壬神課の解説書である以上、土御門家における伝承を疑う必要は特にない。