言うまでもない

The phrase 言うまでもない can be used within a sentence to express the meaning "needless to say", "it goes without saying", or "not to mention..." It's commonly used in written language.

図書館では静かにしなくてはいけないことは、言うまでもない。
It goes without saying that you must be quiet at the library.

お誕生日にリーさんにプレゼントをあげなきゃことは、言うまでもない。
It goes without saying that you have to give Lee-san a present for his birthday.

世界で人気がある日本のポップカルチャーには、アニメは言うまでもなく、ファッションや音楽などもある。
As for Japanese pop culture that's popular throughout the world, anime goes without saying, and there's also things like fashion and music.

今日の数学の試験では、言うまでもなく、掛け算の問題があるんだよ。
Needless to say, today's math test will have multiplication problems on it.