Itami Castle

Itami Castle, also historically known as Arioka Castle, is a flatland-style Japanese fortress located in the city of Itami within Hyōgo Prefecture. Originally constructed by the Itami clan during the Nanboku-chō period, the site underwent significant expansion in 1472 before being completely rebuilt in 1574 by the warlord Araki Murashige. At its peak, the castle was one of the largest in the region, featuring an innovative Sogamae defensive style where the entire surrounding town was encircled by moats and earthen ramparts to function as a unified fortification. Natural barriers provided by the Itami, Daroku, and Ina Rivers were integrated into the design, allowing the structure to withstand a year-long siege by Oda Nobunaga's forces in 1579.

The castle's historical significance is marked by its role in the turbulent Sengoku period and its eventual abandonment. After Araki Murashige rebelled against Nobunaga, the fortress was captured through tunneling tactics and subsequently awarded to general Ikeda Motosuke in 1580. However, following Ikeda's transfer to a new domain in 1583, the castle was deserted and fell into ruin. Today, the site is designated as a National Historic Site of Japan, a status granted in 1979 to protect the remaining archaeological features. Although much of the inner bailey was lost to railway construction in 1891, portions of the original stone walls and moats survive near the modern Itami Station, serving as a tangible link to the area's samurai heritage.