How much money will it take to go on a vacation to Japan for 3 weeks?

Question:

me and my friend is planning to go to Japan when were 21 so we have 6 years to save up. how much money do you think we need individually , please answer if you have experienced going to japan and the costs :))

Answer:

Things will change in 6 years but currently, and has been said a 1000 times before if you had bothered checking the database...

$1500 each for airfare
15,000 yen/night for a double room in a 'regular' hotel
8,000 - 10,000 yen/day/each for meals/transport
Whatever extra daily amount you want to set aside for whatever.

You do the math.