One that revived in terms of pure historical studies, based on densho (books on the esoterica) and so on (however, even after the Meiji period, it was obscurely inherited in rites and festivals and so on of one or two schools).
伝書などに準拠し純歴史学的に再興したもの（但し1、2の流派で明治以降も祭礼等で細々と伝承されたものもある）。