noun
latticed shutters
Traditional Japanese and Chinese architectural element: hinged, horizontally-split wooden shutters with latticework, often used on windows or verandas.
古い町家の窓には、今も蔀が残っている。
On the windows of old townhouses, latticed shutters still remain.
蔀を上げると、庭の景色がよく見える。
When you lift the latticed shutters, you get a good view of the garden.
格子戸 is a lattice door or sliding lattice screen, while 蔀 is specifically a hinged, horizontally-split shutter with latticework, often used on windows.
The kanji 蔀 is composed of 艹 (grass) and 部 (section/part), but the historical derivation of the architectural term is uncertain. The reading しとみ is native Japanese.