Although the Shizuoka Prefectural Office building is worth a close up for its architectural design, what caught my attention was the massive wall below it. Historically, this was the location of Sunpu Castle’s Ote Gate spanning the middle of its three moats. Well-fortified Japanese castles had two-part curtain walls. The stone base could exceed a height of 125 feet. On top was a plaster wall niched with slots for firing weapons.