At the both right and left ends of Tamon (corridor style tower) there are a pair of two-storied and two floor style of sumi yagura (corner tower) forming the distinctive shape, giving the impression as if it were a balancing scale.
長い多聞の左右の端に2重2階の一対の隅櫓を構え、あたかも天秤ばかりのような独特な形をしている。