SUIZAN JAPANのインスタグラム(suizan_japan) - 12月14日 14時26分

Making the Japanese woodworking joinery, “Osaka-jo otemon hikae-bashira tsugite” (Osaka castle otemon gate’s pillar splice).

The two sides have a mountain-shaped joint, and the two sides have a dovetail joint. This joint was for a long time a mysterious and impossible joint; X-ray photography finally revealed its internal structure in 1983. It is a superior and solid joint that can support tons of weight without adhesives.

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