1.
well then, in that case
Used to introduce a conclusion or next action based on what was just said. Casual form of では.
2.
well, so
Used at the beginning of a sentence to signal a transition or wrap up a conversation.
じゃ is the casual contraction of では.
Common expressions
Register
- じゃ: casual
- では: more formal
- じゃあ: casual (variant with lengthened vowel)
Usage
- Very common in everyday conversation
- Often used when parting or transitioning topics
- Can also connect sentences showing logical consequence
Watch out
- The じゃ in じゃない ("is not") is the same contraction inside the negative copula, not this sentence-opening word.
Related Words
Related:
では (formal equivalent)