Akita castle was built in 733 (Tenpyo 5)
Akita Fort, an administrative office to govern the northwestern part of north Japan. Based on the legal code in those days, the central government settled it to include this area to the national system. At that time, buildings built by the central government were symbols flaunting the national power. In addition to political, military, and cultural functions, this fort had been an important trade base in this area since then.
Akita castle was enclosed by 'Tsukiji bai', mud walls of 550meters per side with a tiled roof. In the middle, there is a government building of 94 meters from west to east and 77 meters from north to south and includes the central formal building.