This trend became prevalent as FUJIWARA no Yoshifusa gained power during the eras of Emperor Ninmyo and Emperor Montoku (833 - 858) and aside from Emperor Uta being personally familiar with the art of divination (shueki (eki established in the Zhou Dynasty)), FUJIWARA no Morosuke was so well versed in Onmyodo that he wrote 'Kujodonoikai' and 'Kujo nenchugyoji' (Kujo annual events) incorporating many taboos and manners based upon the principles of Onmyo into guidebooks.
仁明天皇・文徳天皇の時代（833年‐858年間に藤原良房が台頭するとこの傾向は著しくなり、宇多天皇は自ら易学（周易）に精通していたほか、藤原師輔も自ら「九条殿遺誡」や「九条年中行事」を著して多くの陰陽思想にもとづく禁忌・作法を組み入れた手引書を示したほどであった。