noun
unit bath; prefabricated bathroom
A factory-made, self-contained bathroom module (tub, walls, floor, ceiling) installed as a single unit, common in Japanese apartments and hotels.
wasei-eigo (Japanese-coined English), from unit bath
このマンションの浴室はユニットバスです。
The bathroom in this apartment is a unit bath.
ユニットバスは掃除がしやすい。
Unit baths are easy to clean.
Variant with interpunct; rarely used in practice.
Wasei-eigo from English 'unit' + 'bath', referring to a prefabricated bathroom module.