Sanada Maru, Fortification structure at Osaka Castle, Japan
The Sanada Maru consists of stone walls and defensive positions surrounding a section of Osaka Castle's outer perimeter near the Hiranoguchi gate.
Built in 1614 by Sanada Nobushige, this fortification played a key defensive role during the Winter Campaign of the Siege of Osaka against Tokugawa forces.
The fortification design reflects Japanese military architecture of the early 17th century with strategically positioned walls and observation points for defenders.
Located near Osakajokoen Station, visitors can explore the fortification grounds while learning about medieval Japanese military engineering through information panels.
The structure includes underground tunnels and hidden passages that allowed defenders to move quickly between different sections of the fortification during battles.
Location: Esashi-machi
GPS coordinates: 34.67286,135.52628
Latest update: March 7, 2025 12:52
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