Through a friend, my wife Lila stumbled upon these videos on YouTube from a Japanese show called Gaki no Tsukai. They do all sorts of comedy but the ones that were the funniest were the "batsu" ones, which literally means punishment.

The one above is the result of one of the 5 hosts losing a bet, and he has to spend a day in his apartment  and do whatever the announcer says (like wash your face, watch TV, cook breakfast, etc. but the entire time he’s getting "pied" from the other four hosts. And he can’t react at all to the pies of the other people in the house. Hilarity ensues and it’s a belly-laugh good time.

Other ones we’ve found include 24 Hour Tag and a 24 hours in a police station without laughing. Really funny stuff. Something that’s really not seen here in North America.

(Thanks for the link, Jason!)