Why are Japanese castle walls curved?

By making the earthwork walls around the kuruwa curved rather than straight, it became possible to attack the advancing enemy from the sides as well as the front. Side attacks were also common on soldiers entering through the koguchi or castle entrance.



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Often, these walls sloped away at the base to redirect objects dropped from the top of the castle wall, ricocheting them out at soldiers on the ground. Because they had walls to protect them, castle defenders would sometimes hunker down and try to wait out their attackers.

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Construction giant Obayashi Corporation estimated that it would cost 78 billion Yen (766 million USD) to replicate Osaka Castle, the grounds and moat using current construction methods. If you want to live like a prince on a pauper's budget, Kumamoto City will let you be a castle lord for a day.

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Osaka Castle was constructed in 1585 by Toyotomi Hideyoshi. He used it as his base to unify Japan after many years of war. The huge castle took two years to build, with a crew of 20,000 to 30,000 working daily. The stone walls for the main, secondary and tertiary enclosures measure about 12 km in length.

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An arrowslit (often also referred to as an arrow loop, loophole or loop hole, and sometimes a balistraria) is a narrow vertical aperture in a fortification through which an archer can launch arrows or a crossbowman can launch bolts.

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Castles are usually built on high ground with clear views of the surrounding lands – and both of these things make them difficult to attack.

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The short answer is mold, tsunami's and earthquakes is why they didn't build with stone. There are few 'ancient' examples of stone building but most of them came from the Chinese style for the temples that were constructed and you can see the resemblance in the Chinese Pagoda vs. the Japanese toba.

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Germany. The country with the most castles is Germany! It's thought that Germany has around 25,000 castles within its borders. Why does Germany have so many castles?

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Windsor Castle is the oldest and largest inhabited castle in the world and has been the family home of British kings and queens for almost 1,000 years. The castle was established by William the Conqueror (r. 1066-1087) who began building at Windsor around 1070. It took 16 years to complete.

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