GrammarJLPT N5
→ then
Then / Well (Casual Transitional Conjunction)
JLPT N5ConjunctionCasual spoken
じゃあ is the casual spoken contraction of では (or それでは) and is used at the beginning of a sentence or utterance to signal a transition, conclusion, or next step based on what was just said or what is understood from context. It functions much like English "then" or "well then" and carries a natural, conversational tone. Because it is a contraction, じゃあ belongs firmly to casual spoken register; in more formal or written contexts, speakers use では or それでは instead. じゃあ can introduce a suggestion, a decision, a farewell, or a logical follow-up, and it is one of the most frequently heard words in everyday Japanese conversation. The even shorter variant じゃ exists and is similarly casual. Learners should note that while じゃあ often translates as "then," it does not indicate a temporal sequence the way それから ("and then / after that") does; rather, it marks a conversational pivot or a consequence drawn from the preceding context.
Functions
#1 Drawing a conclusion or making a decision based on new information
Structure
じゃあ + statement / decision
雨ですか。じゃあ、家にいます。
Here じゃあ is used to draw a logical conclusion from what the speaker has just learned — namely that it is raining. The speaker takes that information and immediately states their resulting decision. This is the most common use of じゃあ: reacting to something just said and announcing what follows from it.It's raining? Then I'll stay home.
Structures
- Sentence opener
- じゃあ + sentence
Common mistakes
A common mistake is using じゃあ in formal writing or polite speeches where では or それでは would be appropriate, since じゃあ is strictly casual. Another frequent error is confusing じゃあ with それから; while both can translate as "then" in English, それから indicates temporal sequence ("and then, after that"), whereas じゃあ indicates a logical or conversational transition ("in that case"). Beginners also sometimes place じゃあ in the middle of a sentence as if it were a conjunction like から or ので, but じゃあ almost always appears at the very beginning of a new sentence or utterance, often followed by a comma.
Related
ではそれではそれならならじゃ