When I travel to Canada, it is always to the East coast. There is a 12 hour time difference between there and Japan. The first few days are always difficult as I suffer from severe jet lag.
Here are some tips to help:
http://www.japantoday.com/category/top-in-category/view/beating-stress-and-jet-lag
And here is a useful article about jet lag
http://en.wikipedia.org/wiki/Jet_lag
Jus
