joiner; carpenter (interior fittings); cabinetmaker
Refers to a craftsman or shop that makes and installs interior wooden fittings such as doors, window frames, and built-in cabinets. More specific than a general carpenter (大工).
I asked a joiner to replace the shoji screens in the Japanese-style room.
Compound of 建具 (tategu, 'fittings') + 屋 (ya, 'shop' or 'person'). The exact historical derivation is straightforward; the word has been used for specialized joinery shops since the Edo period.