In 1584, when Yura Kunishige and his brother Nagao Akinaga, the leaders of the Yura clan, visited Odawara Castle to pay their respects to the Hōjō clan, they were seized in an act of treachery as the Hōjō armies launched a surprise attack against Kanayama.

She led her 3,000 remaining soldiers and resisted over 15 months, and finally surrendered under the condition at the returner captured sons.

[3] The castle's ruins (which have partly been restored) are currently maintained by the city of Ōta, and there is a local museum at site.

A small valley below the inner bailey was fortified by stone walls and was used as the main gate and was the site of the primary residence of the Yura lords.

This theory was disproved by archeological examinations undertaken during restoration works carried out between 1961 and 1965, which involved the dismantling of the Inuyama Castle's tenshu.