OTSU--A 30-meter-long stone wall and a moat were unearthed at the site of the castle belonging to the 16th ... The discovered moat was confirmed to be roughly 8 meters in width.

Experts say the finding sheds light on the details of how castle-building methods developed during the rule of Hideyoshi (1537-1598), who unified war-torn Japan. The stone wall, which is 1.8 ...