The Meiji government ordered the construction of a set of coastal fortifications to protect the western entrance to the Seto Inland Sea and the cities of Osaka, Kobe and Kyoto starting in 1889.

This fortification covered the Naruto Strait between Shikoku and the western side of Awaji Island.

The largest guns installed were 28-cm howitzers of the same type which were under during the Russo-Japanese War at the Siege of Port Arthur to get effect against the Russian Pacific Fleet.

From the 1920s and 1930s, many surplus guns of the Imperial Japanese Navy, which had been made available due to the reduction of capital warships per the London Naval Treaty and the Washington Naval Treaty, were reused in these coastal artillery installations.

All gun batteries were dismantled at the end of World War II, but some fortifications remain in semi-ruinous state.