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 ...

with distinct patterns still visible. In addition, the city’s castle management team conducted an investigation of the stone walls, involving both ground visual inspections and 3-D ...