It was built in 1881-1884 based on the technology of the western terreplein.
There was a second battery with four 24 cm cannons mounted on the east wall.
The wall is made of “Bluff bond” like stone masonry, using Boshu-ishi (tuffaceous sandstone of Chiba Prefecture.)
Military housings, Ammunition chambers, etc. lie in a row along the terreplein.