更新日：2023年6月7日

Remains of the Imperial Japanese Navy Sasebo Naval Guard Antiaircraft Guns Battery on Mt. Hatten

This battery was built to defend the easternmost part of Sasebo naval port. It was built in 1939 to intercept enemy aircraft trying to intrude into the naval port area from the direction of Imari City.  It was equipped with two 3^rd-year-type (1914) 8cm antiaircraft guns, a Type90 (1930) sound locator, and a 90cm searchlight.  But they were already outdated at the beginning of the Pacific War.  So records say that they could not counterattack effectively during the last stage of the war.  Just before the end of the war, four 10^th-year-type (1921) 12cm antiaircraft guns were introduced.  Though they were also old-fashioned, they were much better than the 3^rd-year-type (1914) 8cm guns.  They had a feature of being able to be used during land battles as well.