jr pass you must buy before entering japan unless it has recently changed. you can purchase it online then activate it when you land in narita airport. or at various places in vancouver. make sure you buy the right pass as some are only for certain areas
IACE CANADA English
can buy from these people in van as well as other places
Can I use my Japan Rail Pass from the airport?
shows which lines you can use from narita and in tokyo with the jr east pass. + other info. dont buy from them as they are located in france