1.
uh-huh, yeah yeah, mm-hmm
A casual back-channel response indicating that the listener is following along and encourages the speaker to continue. Repeating うん emphasizes active listening.
うんうん is the reduplicated form of うん (yeah). The repetition signals active, engaged listening — the equivalent of the English "uh-huh" or "mm-hmm" back-channel.
BACK-CHANNELING (相槌):
Japanese conversation relies heavily on back-channel responses (相槌) to show the listener is engaged. うんうん is one of the most common. Others include:
- うん: simple acknowledgment
- うんうん: active listening
- へー: mild surprise or interest
- そうなんだ: "is that so?"
- なるほど: "I see"
Register
The rhythm and intonation of うんうん convey engagement. A flat, mechanical うんうん may suggest the listener is not really paying attention, while a lively, varied うんうん shows genuine interest.
うんうん is casual. In polite settings, ええ or はい is used instead. Using うんうん with superiors or in formal situations is too familiar.