The stone wall, which is 1.8 meters tall and 7 meters wide and runs east to west, is believed to have been a boundary that divided the central part of the castle and warriors’ residences.

OTSU--A 30-meter-long stone wall and a moat were unearthed at the site of the castle belonging to the 16th-century samurai general who betrayed feudal warlord Oda Nobunaga (1534-1582). The city ...