As it is believed that Tsuchimochi clan's expansion of territory into this region south of the Gokase-gawa River and the Ose-gawa River came with acquisition of half of Agata no sho by Hidenobu (栄宣) TSUCHIMOCHI in 1336 ('Tanabe clan Tree'), it is therefore reasonable to consider that Tsuchimochi clan occupied the castle some time after the first quarter of the 14th century.
五ヶ瀬川・大瀬川以南のこの地域に土持氏領が拡大するのは、建武(日本)3年（1336年）に土持栄宣が縣荘の半分職を獲得（「田部氏系図」）して以降と考えられるから、土持氏がこの城に居城するのは14世紀前半の半ば以降と考えるのが妥当であろう。