Stone coffins at Bizen Gate. Due to a shortage of stones during the castle's construction, many stone coffins unearthed from the tumulus on the hill of the castle were used in the rock walls. The stone coffins were replaced by real stones during the c

Due to a shortage of stones during the castle's construction, many stone coffins unearthed from the tumulus on the hill of the castle were used in the rock walls. The stone coffins were replaced by real stones during the castle restoration in the 1960s.