Sakai clan
Ikkan-ji is a Sōtō sect temple built during the Kan'ei era (1624–43) and was consecrated by Sakai Tadashige, a local administrator of Shimoniikura in the Edo period. It served as the family temple of the Sakai clan. "Gorintō", or stone five level pagodas were placed at graves as a memorial and to console the spirits of the departed. Three "gorinto" can be found at Ikkan-ji at the graves of Tadashige Sakai, his wife, and a former administrator's wife.