讚岐國
The roots of the current castle lie in 1587, when Marugame Castle was the residence of the lord of the Sanuki Province, Ikoma Chikamasa. In 1597, Chikamasa constructed Takamatsu Castle as his new location from which to rule from and turned Marugame Castle over to his son, Ikoma Kazumasa. Kazumasa immediately began renovating the castle, and made it into a formidable fortification. In 1615, however, due to a shogunal decree that each province could have but one castle, Marugame Castle was dismantled.