[5] After the Battle of Sekigahara, Tosa Province was given to Yamanouchi Kazutoyo and he appointed his senior vassal Goto Tameshige as the lord of the castle.

[3] The castle is now in ruins, with low some stone walls, wet moats, and ramparts or other earthworks.

The Aki City Historical Museum is on site.

[3] Adjacent to the castle is the preserved samurai residential district of Doi Kachū.

[4] Doi Kachū was designated a Group of Traditional Buildings of Japan in 2012.