Needless To Say
You must not consider this a theory, because of course it's a fact. Needless to say, this is the way things are.
This word is often written in kana, but it's worth knowing the kanji version too.
This word uses the readings you learned with the kanji. Needless to say, you should be able to read this on your own!
Of course we have that product in our store.
Of course I want to be able to speak Japanese, but I also want to be able to speak French.
Needless to say, there are people who can study in between looking after children, but it's difficult for me.