inquiry for Japan Rail Pass

is anyone planning to visit Japan for your next adventure?
has anyone come up with an idea to travel through japan by train with a railway pass called japan railway pass? it's a very affordable, convenient, coin-free and reasonable railway pass that JR (japanese railway) offers.

here is the url for more info.
japan rail pass
(in English, Chinese, Korean, Dutch, French and Japanese)

however, you may not find juicy details that you are desperate to get from their website.
they don't tell every single thing on it.

I found a telephone number for those who calling from overseas for all inquiry about JR service.
the operators speak English as well as Japanese.

the contact number;
+81(0)50 2016 1603


mind you that you HAVE TO OBTAIN the pass IN PRIOR TO YOUR ARRIVAL IN JAPAN (apparently there was an exceptional period in which you could purchase it in japan during the world cup in 2002).