Why Japanese Temples Are Held Together Without A Single Nail

The Horyu-ji temple has stood for 1,400 years. Not one nail holds it together. Every joint is wood interlocking with wood. In this video, Patina examines a kanawa-tsugi joint up close to find what no-nail joinery actually accomplishes. Along the way: timber aging, earthquake flex, and the engineering of carpentry that breathes. If you enjoy videos about hidden engineering and Japanese craft, subscribe to Patinated for more. In this video we look at: • Why Horyu-ji needs no nails • How kanawa-tsugi locks itself • What 1,400 years of flex proves 0:00 A temple with no nails 1:24 The interlocking joint 3:45 Timber expands and contracts 6:12 The 1596 earthquake test 9:30 Why glue would fail 12:08 The repair philosophy Sources: Nishioka, T. (1985). The Art of Japanese Joinery. Weatherhill. Brown, R. (2007). Traditional Japanese Architecture. Tuttle Publishing. #Patinated #Horyuji #JapaneseTemple #KanawaTsugi #WoodJoinery