Since the post of Emperor had been vacant for a long time in this period, Emperor Jingu was considered to be the Emperor (Empress acted as Emperor) and counted as the fifteenth Emperor, however, she was excluded from successive Emperors by Shosho (imperial edict, decree) issued in October 1926.
この時代は、長期間にわたって天皇が空位のままだったため、明治時代以前は神功皇后を天皇（皇后の臨朝）とみなし、15代の帝と数えられていたが、1926年（大正15年）10月の詔書により、歴代天皇から外された。