Japan repairs centuries-old temples without modern nails. Here’s how

Centuries-old temples in Japan are still repaired without using modern nails, screws or metal brackets. In Japan, master carpenters instead continue to follow an ancient woodworking technique that has been passed down generations for more than 1,000 years.The method which is called kigumi involves carving wooden joints precisely so that they fit together like puzzle pieces. Beams, pillars and other parts of the structure are also shaped to lock into one another without the need for metal fasteners. This traditional technique is still used to restore some of Japan's oldest temples and shrines. These structures have survived earthquakes, typhoons and changing weather for centuries.The craftsmen who carry out the work are known as miyadaiku or temple carpenters. Why Japan avoids nails The continued use of wooden joints is not just about preserving the tradition. The method also has practical advantages.