 After the Meiji Restoration in 1867, the Emperor was the embodiment of all sovereign power in the realm, as enshrined in the Meiji Constitution of 1889.Since the enactment of the 1947 constitution, the role of the Emperor has been relegated to a ceremonial head of state without even nominal political powers.Since the mid-nineteenth century, the Imperial Palace has been called , later , and is on the former site of Edo Castle in the heart of Tokyo (the current capital of Japan).