However, according to the chronicle of Suiko in "Nihonshoki," she was named the empress at the age of 18 and, when this theory is adopted, she became the empress in 571, the year of enthronement of Emperor Bidatsu, contradicting an article on investiture of Hirohime as the empress and suggesting a possible mistake either in the article on investiture of Hirohime as the empress or the age of Suiko at the time of her investiture as the empress.
ただし、『日本書紀』推古紀によれば18歳で皇后に立てられたとあり、これを採用した場合には欽明天皇32年（敏達天皇即位の年）に皇后となったことになり、広姫立后の記事と矛盾することになり、広姫立后記事か推古の立后時の年齢のいずれかが誤りの可能性がある。