Osaka Castle's Octopus Stone weighs over 120 tons, among 5 megaliths exceeding 100 tons

Osaka Castle's Octopus Stone weighs over 120 tons, among 5 megaliths exceeding 100 tons. The Octopus Stone (also called Drum Stone) measures 5.5m x 11.7m and weighs more than 120 tons At Osaka Castle, there are 5 stones weighing more than 100 tons each There are 15 stones weighing more than 50 tons each

Osaka Castle's Octopus Stone is 5.5m × 11.7m, weighs 120+ tons, and may date to the 4th century imperial palace. How builders fitted these massive irregular blocks with such precision remains unknown.

Key Facts

• The Octopus Stone (also called Drum Stone) measures 5.5m x 11.7m and weighs more than 120 tons
• At Osaka Castle, there are 5 stones weighing more than 100 tons each
• There are 15 stones weighing more than 50 tons each
• The octopus stone has a thickness of 70-90 cm
• Experts remain uncertain how these giant stones were assembled together
• The stones may be remnants of the original imperial palace from the 4th century AD, or repurposed from the Buddhist temple
• The blocks have irregular shapes but are fitted together with spectacular precision

Related site: Osaka Castle — view location, images, and history on the Ancient Nerds map.

Source: The Enormous Megaliths of Osaka Castle in Japan by Ancient Architects