The stones in the stone wall on the observer's right were piled up by the method of original 'gobozumi', and stones on the left were newly piled up with the method of 'otoshizumi' (a method of piling up stone wall, putting rectangular stone on the angle for leaning over on the next stone).
向かって右手が築城当初からの「ごぼう積み」、左手が新たに積み直された「落し積み」となっている。