Octopus stone, Natural stone formation at Osaka Castle, Japan
The Octopus Stone is a large granite block located near Sakuramon-masugata Square in the eastern section of Osaka Castle grounds in Japan. It sits directly along one of the main pathways, making it visible from several angles as visitors walk through the area.
The stone was placed in 1624 under Ikeda Tadakatsu during the early construction of Osaka Castle. It was brought from Inujima island, showing the distances materials were moved to build the castle.
The stone gets its name from a natural hollow on its surface that vaguely resembles an octopus shape. Visitors often pause to find the likeness, turning it into a small moment of discovery during a walk through the castle grounds.
The stone is easy to find when walking through the eastern part of the castle grounds toward Sakuramon gate. It sits right along the path, so no detour or special preparation is needed to see it.
Although the block is one of the largest granite pieces on the castle grounds, it is not its size that draws attention but the small natural mark on its surface. Most visitors walk past stones of similar size without a second glance.
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