Aikikai Hombu Dojo (合気会 本部道場) is the headquarter of the Aikikai which is an umbrella organization of various national Aikido organizations. The dojo (training location for martial arts) is located in Tokyo and was founded by Morihei Ueshiba in 1927.
... merely designated anyone who assumed power for any period of time without a legitimate basis of authority.
The first to have the title of "Tyrant" was Pisistratus in 560 ...