According to Takeuchi monjo, the present reigning line starting from Emperor Jinmu is called 'Kamuyamato-cho' and it is said that, before that, there were 'joko (ancient times) twenty-five eras' (or, 'koto - imperial line - twenty-five eras') followed by 'seventy-three eras of the Ugaya Fukiaezu Dynasty' (the seventy-third emperor was Emperor Jinmu) and even before these there were 'seven Tenjin eras.'
竹内文書では神武天皇からはじまる現在の皇朝を「神倭朝（かむやまとちょう）」と呼び、これ以前に「上古25代」（または「皇統25代」）とそれに続く「ウガヤフキアエズ王朝（あえずちょう）73代」（73代目は神武天皇のことである）があり、さらにそれ以前に「天神7代」があったとしている。