Think of some stuff to do and/or an event to centre the trip around
Negotiate a suitable set of dates with your comrades
Check prices for airfares and jiggle the dates until optimal
Apply for leave from work
Chase management for receipt of request
Confirm leave approval
Thrash out a rough timeline of where to be on which days
- Figure out where you'll be and book accommodation
- How much is accommodation going to cost?
- How about travel?
- JR pass?
Car hire? http://rent.toyota.co.jp/en/index.html
- How many yens will you need? Buy some yens