Karaoke is such an insane invention that it should come as no surprise that it was the Japanese who first came up with it. Nowadays drunken karaoke is an everyday occurrence in most countries, but it is still Japan where karaoke culture thrives the strongest.
Karaoke bars are easy to find in Japan, especially in the entertainment centers of the larger cities
Japanese karaoke is traditionally sung in private rooms, where you can embarrass yourself so that only your friends (who probably already know you’re a very embarrassing person) see. My usual choice of song? A very Nirvana-grunge version of Britney Spears’ Hit Me Baby One More Time. Kills every time.