Why are no nails used to build Ise Shrine and other old wooden buildings in Japan?
Nails made of metal such as iron were available, but due to the humid climate in Japan these metal nails would rust and eventually fail.
Kigumi (literally means construction with wood) joinery has made it possible for wooden buildings to last over 1,000 years despite the countless earthquakes that hit Japan.
The video shows you how the Kigumi joinery is put together.
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