Ningengakki is the Japanese adaption of a game already available overseas where people have to touch each other to produce any kind of sound or music.
Designed for four player, Ningengakki is a little music box that you and your partners have to hold in one hands and touch each other with the others hands to make it work

With a set of different pre-recorder tunes as well as a wide range of instruments, Nigengakki will allow you to play or create your own tune by just gently touching your partner… Slapping or punching each other also works but may not be recommended, unless you are in this kind of stuff of course.

Or here on YouTube