Moreover, in the Tsunetomi and Atago area, many regional names derived from temples which no longer exist, including Seikoji, Wagoji, Wahoji, Kofukuji, Riseiji and Tanaka Sosenji (田中惣泉寺) (possibly the site of 'Tanaka Yakushi' in "Enryo Seikan") dot an area within a mere one kilometer square and this combined with the castle remains provide important clues along with the trends in influence in the Nobeoka district from ancient times until the period of clan government.
さらに、恒富・愛宕地域には、西光寺、和合寺、知法寺、光福寺、利生寺、田中惣泉寺（『延陵世鑑』にある「田中薬師」寺跡か）など、現存しない寺院名に由来する小字名がわずか1キロメートル四方の範囲に近接して点在しており、城跡と合わせて古代以降から藩政期以前の延岡地域の勢力動向を考察する上での重要な手がかりとなろう。