Analysis of information sources in references of the Wikipedia article "Luật Quốc kỳ và Quốc ca Nhật Bản" in Vietnamese language version.
In 1870 the [Hinomaru] was designated as the national flag by means of a 'declaration (fukoku) by the Council of State (Daijō-kan太政官). In 1871, however, the Council was reorganized and the legislative function entrusted to the Left Chamber (Sa-in). Finally in 1885 the Council was replaced by a modern cabinet, with the result that the Council's declarations were abolished.