For traditional carpenters looking at the wood joints of the machiya, old wooden houses and temples must be like heaven.
I attended a meeting for people living in a machiya. Several different wood joints were exposed: for vertical beam, horizontal beams, corner joints.
An architect told me that at this meeting that his father was a carpenter and used to make them all by hand and he learnt this skill from him. So even he could still make many different kind of wood joints by hand.