On the gates of the Imperial Palace in the Edo Period, the following points were clarified. 1. The Shomeimon in the Imperial Palace, built in the Keicho era, had formal characteristics while the Gekkamon had informal ones. 2. The South gate in the Imperial Palace in the Keicho era, was built for the Enthronement. 3. Shomeimon and Nikkamon built in the Kansei era were used properly according to the kind of ceremonies as well as the Heian Palace. 4. The space of the Imperial Palace in the Edo Period are characterized by the ambiguities of the owning region of the Emperor.
