Yeah, the weekend's just about to end in Japan but tomorrow is the Emperor's Birthday Holiday.
Mt Gox has already advised that they'll be working in a limited capacity from 24 December to 7 January. It's a 5 day weekend in Japan next weekend, too so it's not the ideal time of year for doing stuff involving banks.
Dear customers and friends! It is, once again, the period of the year where most of you will spend time with relatives, loved ones and friends for some well earned holidays and for some fun! While Bitcoin never seems to stop, we at Mt.Gox like you are just merely mortal humans that sometimes also need some rest and fun! This is why, from December 24th to January 7th, Mt.Gox will work in limited capacity while still being able to help you whenever a question arises or regarding your account.
https://mtgox.com/press_release_20121214.html