Breakdown of hassoukigen wa ashita desu.
Questions & Answers about hassoukigen wa ashita desu.
は marks the topic of the sentence.
So in 発送期限は明日です, the topic is 発送期限. The sentence is talking about the shipping deadline and then saying what it is.
A useful way to think about it is:
- As for the shipping deadline, it is tomorrow.
English usually does not separate topic and comment as clearly as Japanese does, so this can feel unfamiliar at first.
