: Used to extend the length of a single timber beam by connecting two pieces end-to-end.
The primary guide for understanding these techniques is the seminal book by Torashichi Sumiyoshi and Gengo Matsui . It provides a comprehensive breakdown of over 140 types of joints, focusing on their structural roles in temples, shrines, and traditional homes. Core Concepts of Japanese Joinery
: A specific method of tapping and compressing a tenon (the "male" part of a joint) so that once inserted, it expands naturally for an incredibly tight, permanent fit. Common Joint Types
Traditional joinery uses hundreds of variations, but several key types form the foundation of classical structures: Wood Joints in Classical Japanese Architecture PDF - Scribd
: Used to connect structural components at an angle, such as where a horizontal beam meets a vertical column.
Classical Japanese architecture relies on interlocking wooden components that do not require nails, screws, or adhesives. These joints are designed to be strong yet flexible, allowing buildings to withstand seismic activity by absorbing energy through movement rather than fracturing.