However, with town development and development of the Atago roads, housing is being built and several hilly areas which were thought to be outposts of the castle between the north of the castle and Nobeoka High School have been destroyed.
しかし、都市開発や愛宕通線の整備にともなって宅地が造成され、城の北、延岡高校との間にあった出城と思われるいくつかの丘陵が破壊された。