There were nine fortified installations and 20 coastal defence positions commanded from Kataoka Fortress.
In addition, it was the headquarters for the Imperial Japanese Navy Fifth Fleet, located on Kataoka.
Kataoka was a native of Tosa Province (present-day Kōchi Prefecture, and served as an office with the police force from Shiga Prefecture.
Since 2003, Kataoka has been the Chief Curator of the Mori Art Museum, Tokyo, Japan.