contrast marker
Indicates contrast with another option, stated or implied. Pronounced わ.
犬は好きですが、猫は嫌いです。
I like dogs, but I don't like cats.
As for this book, it's interesting.
肉は好きだが、魚は好きじゃない。
I like meat, but I don't like fish.
You mustn't give up.
は is the standard topic marker, while って can casually replace it to mark a topic with a more conversational or emphatic feel.
は marks the topic or known information the sentence is about, while が marks the grammatical subject and often introduces new information.
は often sets up a contrast between two things, whereas も says the same thing applies equally, without contrast.
は is the general topic/contrast particle used after nouns and phrases, whereas には is specifically は attached to に, keeping a locational, temporal, or purposive meaning while adding topic or contrast.
Kana particle; pronounced わ in modern Japanese.
Derived from the Old Japanese topic particle は, with the pronunciation shift from /pa/ to /wa/ occurring in the Early Middle Japanese period.