Usage & register · Foundation–N4
はい does not always mean “yes, I agree”
Understand はい as acknowledgement as well as yes/no response.
In short
はい can answer an affirmative question, but it also frequently means “I hear you”, “understood”, or “I am attending to what you said”.
How it works
In instructions or service interactions, repeated はい may simply acknowledge each piece of information. Agreement with an opinion is a different conversational act.
Useful contrast
This is one reason Japanese backchannel behavior can sound like constant agreement to English ears even when it is not.
Examples
はい、わかりました。
Yes/Understood.
はい。はい。
Mm-hm / I am following you.
Common pitfall
When interpreting conversation, look at the following response and context rather than translating every はい as an endorsement.