'Unique, peerless shinto'. Also known as Yoshida Shinto, Urabe Shinto (Urabe was the former name of the Yoshida clan) or genpon sogen Shinto (fundamental source Shinto). It was a monastic Shinto lineage of the Yoshida priestly clan who were advisors to the imperial household. A Yoshida influence can be traced back to their role in the jingikan in the Heian period, but the yui-itsu tradition was really founded and systematised by Yoshida, Kanetomo (1435-1511). It incorporated Taoist, Confucian and particularly Buddhist (especially ryobu Shinto) elements such as a Shingon-type distinction between 'exoteric' Shinto (based on the Nihongi and Kojiki) and 'esoteric' Shinto (revealed only through secret texts transmitted in the Yoshida family; see Shinto Gobusho). Yui-itsu Shinto was successfully developed by Kanetomo's successor, Yoshida, Kanemigi and remained influential until the early nineteenth century when it came to be overtaken by kokugaku and fukko Shinto ideas.
A Popular Dictionary of Shinto. Brian Bocking.