サッシ
Borrowed from English 'sash' (the frame of a window). In Japanese the word has narrowed to refer almost exclusively to factory-made aluminum window frames and their rails. The English meaning 'a sash worn around the waist' is not part of the Japanese word.
Usage
In Japanese houses and apartments, sliding aluminum-frame windows became standard from the 1960s onward, replacing earlier wooden frames. As a result, サッシ today is closely associated with that style of window. Window-related words like レール ('rail'), 戸車 ('roller'), 窓枠 ('window frame'), and 結露 ('condensation') often appear in the same context.
Common collocations
- アルミサッシ: aluminum window sash
- 二重サッシ: double window (an additional inner window installed for insulation)
- サッシのレール: the rail/track of a window frame
- サッシの溝: the groove of a window frame
- サッシを掃除する: to clean the window frame
- サッシを拭く: to wipe down the window frame
- サッシを交換する: to replace the window sashes
- サッシに結露する: for condensation to form on the window frame
- サッシのカビ: mold on the window frame
- サッシ屋: a window-frame contractor; a sash dealer
Similar words
- 窓: window — the general word; refers to the whole opening or to the glass.
- 窓枠: window frame — a near-synonym of サッシ; the more native, descriptive word, less specifically tied to aluminum.
- 引き戸: sliding door/window — refers to the sliding mechanism; commonly used about Japanese sliding doors and windows.
- 網戸: screen door/window — the bug-screen panel that slides alongside a サッシ.
- 雨戸: storm shutter — the outer sliding shutter that protects the window.
Cultural note
Many Japanese homes built in the late 20th century used single-pane aluminum サッシ, which conduct heat poorly and are prone to condensation in winter. As awareness of energy efficiency has grown, retrofitting older homes with 二重サッシ (double sashes) or 内窓 (inner windows) has become a popular renovation, marketed as a way to reduce heating bills and prevent mold.