Gakubuchi (額縁) – moulding, or casing (ケーシング) that is fixed around the frame of an interior window or door. Gakubuchi technically refers to the decorative moulding that encases a picture frame, but is now also used in this context as well. There are generally 2 types of interior window and door frames: Ones with casing (on left) and ones without (on right).

Casing Diagram


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