However at that time, as the Japanese government did not know about the usurpation of Tang Dynasty by Busokuten (Empress Sokuten) and the fact that it had been succeeded by Bushu Dynasty, AWATA no Mahito and others led to a slight confusion when they got there.
しかし当時、唐王朝は武則天（則天武后）による簒奪で武周王朝に代わっていたことを日本側が把握していなかったため、粟田真人らは現地で若干の混乱を生じた。