In terms of Imperial succession, it is mentioned in Clause 2 of The Constitution of the Empire of Japan, 'Under Imperial Family Law, male members, or their grandchildren, of the Imperial family would succeed the throne,' there was the order of Imperial succession in the first chapter of the former Imperial Family Law, and in the second chapter of the same Law, there was a description about accession to the throne.
皇位の継承について大日本帝国憲法第2条で「皇位ハ皇室典範ノ定ムル所ニ依リ皇男子孫之ヲ繼承ス」とあり、旧皇室典範第一章に皇位継承順位、第二章に践祚即位について規定されていた。