In 1926 the management of Kotofu Rei (literally, the Order of the Record of Imperial Lineage) was improved, and the Kotofu Rei (Order of the Record of Imperial Lineage) (Koshitsu Rei [literally, Imperial House Act] No.6 of 1926, the previous Order of the Record of Imperial Lineage) was enacted.
1926年（大正15年）に至り、皇統譜令の取扱いを整備することとなり、皇統譜令（大正15年皇室令第6号、旧皇統譜令）を定めた。