Karaoke Lyric Displays

In karaoke bars in Japan, are the lyrics of Japanese songs typically displayed in Japanese? Is there a way to display in romaji? As you can tell, I've never been to one and was just curious how it worked.

L,

In karaoke bars in Japan, are the lyrics of Japanese songs typically displayed in Japanese?

Yes.

Is there a way to display in romaji?

No.

If you can't read Japanese, you'll have to stick to English (or other language) songs.

For the kanji words, is there only the kanji, or is there also the little letters on top of them that gives the pronounciation (I believe they're called furigana, but I'm not sure...)... I can read hiragana and katakana, bur most of the kanji causes me problems...

sometimes there are furigana,
sometimes not.

but the not furigana version is more often I guess

Maybe this has to do with karaoke?

Does anyone know why when singing in Japanese they pronounce every kana? While speaking they say words normally...

Reason why is because I had a hard time at first singing at karaoke in Japanese because I had to keep reminding myself to sing every kana instead of how I would normally speak it.