japan december 30th- february 30th

travelling with a friend at the end of this yr, backpacking, starting in tokyo training it down to nagasaki stopping at all the main places then flying up to sapporo for ski, then home

how much will i need to take money wise?? want to do it as cheap as possible

and what places are a must see!!

thanks

If you travel extremely cost conscious, you can keep your daily budget below 5000 yen. Some tips:
http://www.japan-guide.com/e/e2028.html