>My "grandmother-in-law" lives in an old house on the outskirts of Kyoto Japan. The house was originally built by a wealthy businessman. It is large (by Japanese standards) and well constructed. It is framed with traditional joinery and no nails. The framing and trim are mostly composed of softwoods such as Akamatsu (red pine) Hinoki (Cypress) and Sugi (cedar) with decorative elements in Keyaki (Zelkova).
However, one mark of high qualty construction is a particular construction detail using Sakura (cherry).
What would this be?