This study examines the historical significance of the Takaoka Old Castle Park in Toyama prefecture, Japan, from a sociocultural perspective by analyzing related historical materials. This study began by understanding the structure of an old castle town, the military and economic responses after the abandonment of Takaoka castle, and the managerial situation during the conservation and occupation of the ruined castle in the early modern period. Next, This study focused on the response to its disposal notice after the Meiji era, the sentiments from its disposition in 1872 to the petition for restoring and transforming it into the Takaoka Old Castle Park in 1874, and its contribution to Kajuro Hattori. The process leading to the park’s opening originated from the accumulated significance and meaning of the abandoned castle based on the residents’ attachment to it in response to the institutional changes (the abolition of old castles, the opening of modern parks) introduced by the Meiji government. The attachment was nurtured by the castle conservation policy of the feudal lords and its utilization and maintenance by the residents during the early modern era.
