also: じゃね · じゃーね
A casual, friendly farewell used among friends, family, or close acquaintances. Not used in formal situations.
See you, see you tomorrow!
My part-time job is over, so bye.
A drawn-out, playful or emphatic variant.
Derived from では (dewa), a conjunction meaning 'well then', with the particle ね (ne) added for a softer, friendly tone. The contraction じゃあ (jaa) is a casual spoken form of では.