Mariyatsu Castle, Hill castle in Kisarazu, Japan.
Mariyatsu Castle is a hill castle in Kisarazu that spreads across a natural ridge and is surrounded by clay walls and dry moats. The site features multiple levels and terraces built into the slope to create strong defensive barriers.
The castle was founded in 1456 as a military outpost to control trade routes and defend territory during a period of regional conflict. Its position on the ridge made it an important point for monitoring movement across the Boso peninsula.
The layout shows how castle builders used the natural ridge to their advantage, with multiple levels and sections that made defense easier against attackers from any direction.
The grounds are open to walk and explore the remaining earthworks and levels. Sturdy shoes help when moving across the uneven terrain, especially after rain when the clay paths become slippery.
The castle sits between two rivers that provided water for the occupants and created additional natural defenses. The waterways also gave the garrison access to local trade networks that moved goods through the region.
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