 Emperors have been known to come into conflict with the reigning shogun from time to time.Some instances, such as Emperor Go-Toba's 1221 rebellion against the Kamakura shogunate and the 1336 Kenmu Restoration under Emperor Go-Daigo, show the power struggle between the imperial court and the military governments of Japan.Until recent centuries, Japan's territory did not include several remote regions of its modern-day territory.