maruoka castle’s stone walls are about 6.2 meters high. the stone walls were built using "nozura-zumi" (野面積み), an architectural method to build stone walls with a good system of drains. this protects the building from damage by heavy rain. maruoka castle is also famous for its steep stairs. the stairs that go up from the first floor to the second floor are at an angle of 65 degrees. the stairs from the second floor to the third floor are at an angle of 67 degrees.